What is the NPK analysis?
The declared NPK analysis is 18-11-18 (N–P₂O₅–K₂O), with 2.5% MgO and trace elements.
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ICL
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ICL Universol Blue 25kg is a professional water-soluble fertiliser for balanced mid-season feeding for nursery, pot and bedding crops.
With a declared analysis of 18-11-18 + 2.5% MgO + trace elements, this formulation allows growers to select nutrition for a specific crop stage and irrigation-water profile.
ICL's Universol range uses its Bright Solution System and colour-coded formulations to help professional growers prepare consistent feeding programmes. Supplied in a 25kg bag.
Key benefits
- Declared NPK analysis: 18-11-18
- Includes 2.5% magnesium oxide and trace elements
- Water-soluble nutrition for professional horticultural feeding programmes
- Formulation selected for balanced mid-season feeding for nursery, pot and bedding crops
- 25kg commercial bag
Where this formulation fits
Use Blue for balanced mid-season feeding for nursery, pot and bedding crops. Crop response depends on the species, growth stage, root-zone conditions and the balance of nutrients already supplied by the growing medium and irrigation water.
Where hard or soft irrigation water presents particular challenges, compare the dedicated Universol Hard Water and Soft Water ranges before selecting a feed.
Preparing & applying the feed
Dissolve the fertiliser in water using the current ICL mixing and application guidance for the product and your crop. Check irrigation-water analysis, including alkalinity and EC, when setting a fertigation programme.
Monitor stock solution clarity, feed EC and pH, crop growth and drainage. Avoid assuming a single concentration is appropriate for all crops or irrigation systems. Check concentrated stock-tank compatibility before mixing with other fertilisers, especially calcium-containing products.
Managing a professional nutrition programme
Consider how this water-soluble feed complements any controlled-release fertiliser already present in the substrate. Review nutrition as crops establish, grow and finish, rather than relying on a fixed recipe for the entire production period.
Store sealed in a dry area, protect from moisture and follow the current product label and safety information when handling fertilisers.
ICL Universol Blue 25kg product details
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Universol Standard |
| Formulation | Blue |
| NPK (N–P₂O₅–K₂O) | 18-11-18 |
| Magnesium oxide (MgO) | 2.5% |
| Micronutrients | Trace elements (TE) |
| Bag size | 25kg |
| Primary application | balanced mid-season feeding for nursery, pot and bedding crops |
ICL Universol Blue 25kg FAQs
When is this formulation most useful?
It is designed for balanced mid-season feeding for nursery, pot and bedding crops. Select it in the context of your wider nutrition programme. Can I use it through fertigation?
Universol is a water-soluble fertiliser range used in professional feeding programmes. Confirm your irrigation equipment, stock-tank dilution and water quality are suitable. How do I choose a feeding concentration?
Base the concentration on crop demand, water analysis, substrate EC and the current manufacturer recommendations; monitor the feed solution and crop response. Can it be mixed with other fertilisers?
Do not assume all products are compatible in a concentrated stock tank. Follow the ICL product-specific mixing guidance and conduct a compatibility check before changing the programme. How should I store an opened bag?
Keep it sealed in a cool, dry place and prevent moisture entering the bag. Does water quality affect product selection?
Yes. Irrigation-water hardness, bicarbonate content and existing nutrients can affect which Universol formulation is appropriate.
ICL Osmocote Topdress Pro Fusion Technology - 25kg
12473
£124.73
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ICL Osmocote Topdress Pro Fusion Technology - 25kg
12473
£124.73
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ICL Osmocote Topdress Pro Fusion Technology - 25kg is a professional Osmocote Topdress FT controlled-release fertiliser formulated for topdressing established container nursery stock.
Its resin-coated nutrients provide a measured supply over a nominal 4–5-month period at 21°C, helping growers match fertiliser longevity to their crop cycle.
Key benefits
- Fusion Technology for adherence to growing-medium surface
- Designed for established container nursery stock
- 22-5-6 + 2MgO and trace elements
- 4–5-month nominal longevity at 21°C
- 25 kg bag
Professional applications
Suitable for topdressing established container nursery stock. Plan nutrition around crop demand, irrigation water, substrate properties and any supplementary feeding.
How to apply
Apply evenly to the growing-medium surface according to ICL’s current topdress instructions and crop requirements. Fusion Technology helps the fertiliser adhere to the substrate surface, reducing granule loss when containers are moved or tipped.
Application rates & nutrient management
Use the current ICL topdress dosage guidance for the crop and container size; a universal application rate is not appropriate.
Manufacturer rates are general recommendations for unfertilised substrates. Adjust to local growing conditions and other nutrient inputs. Trial programme changes on a small scale before wider adoption.
Storage & handling
Keep partly used bags sealed and store in dry conditions. Follow current ICL product information and safety guidance.
Technical specifications
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Osmocote Topdress FT controlled-release fertiliser |
| NPK (oxide basis) | 22-5-6 |
| Magnesium | 2% MgO |
| Trace elements | Included |
| Nominal longevity | 4–5 months at 21°C |
| Pack size | 25 kg |
| Typical application | topdressing established container nursery stock |
Frequently asked questions
What is this fertiliser used for?
It is designed for topdressing established container nursery stock. What does the stated longevity mean?
ICL rates this product at 4–5 months at a growing-medium temperature of 21°C. Higher temperatures generally shorten the release period; lower temperatures extend it. Can it be combined with liquid feeding?
Yes, where the crop programme calls for it. Reduce the controlled-release fertiliser rate appropriately when adding water-soluble nutrients to avoid excessive total feeding. How should unused product be stored?
Reseal opened bags and store in dry conditions, following the manufacturer’s storage instructions. How do I select a rate?
Choose a rate according to crop demand, growing medium, container volume, season and any additional feeding. The published rates are general starting points for unfertilised substrates; trial changes on a small scale. What is Fusion Technology?
It is designed to help fertiliser granules adhere to the surface of the growing medium after topdressing. Is this a substitute for incorporating fertiliser at potting?
It is particularly useful for topdressing established containers; choose a nutrition programme based on the crop’s current and future needs.
ICL Osmocote Pro 8-9 Months 18-9-10 2MgO+TE 25kg
13980
£139.80
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ICL Osmocote Pro 8-9 Months 18-9-10 2MgO+TE 25kg
13980
£139.80
Unit price per
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ICL Osmocote Pro 8-9 Months 18-9-10 2MgO+TE 25kg is a professional Osmocote Pro controlled-release fertiliser formulated for incorporation into growing media for container nursery stock.
Its resin-coated nutrients provide a measured supply over a nominal 8–9-month period at 21°C, helping growers match fertiliser longevity to their crop cycle.
Key benefits
- Fully coated NPK, magnesium and trace elements
- Predictable release for container crops
- Useful in nursery nutrition programmes alongside appropriately adjusted water-soluble feeding
- 8–9-month nominal longevity at 21°C
- 25 kg bag
Professional applications
Suitable for incorporation into growing media for container nursery stock. Plan nutrition around crop demand, irrigation water, substrate properties and any supplementary feeding.
How to apply
Mix granules evenly through the growing medium before potting, following the current manufacturer instructions. ICL advises against dibbling for the short-duration Pro variants; check the current instructions for the exact product before choosing any alternative application method.
Application rates & nutrient management
Container nursery stock: 3–3.5 g/L (light), 3.5–4.5 g/L (normal), 4.5–5.5 g/L (heavy).
Manufacturer rates are general recommendations for unfertilised substrates. Adjust to local growing conditions and other nutrient inputs. Trial programme changes on a small scale before wider adoption.
Storage & handling
Keep partly used bags sealed and store in dry conditions. Follow current ICL product information and safety guidance.
Technical specifications
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Osmocote Pro controlled-release fertiliser |
| NPK (oxide basis) | 18-9-10 |
| Magnesium | 2% MgO |
| Trace elements | Included |
| Nominal longevity | 8–9 months at 21°C |
| Pack size | 25 kg |
| Typical application | incorporation into growing media for container nursery stock |
| Manufacturer guidance | Container nursery stock: 3–3.5 g/L (light), 3.5–4.5 g/L (normal), 4.5–5.5 g/L (heavy). |
Frequently asked questions
What is this fertiliser used for?
It is designed for incorporation into growing media for container nursery stock. What does the stated longevity mean?
ICL rates this product at 8–9 months at a growing-medium temperature of 21°C. Higher temperatures generally shorten the release period; lower temperatures extend it. Can it be combined with liquid feeding?
Yes, where the crop programme calls for it. Reduce the controlled-release fertiliser rate appropriately when adding water-soluble nutrients to avoid excessive total feeding. How should unused product be stored?
Reseal opened bags and store in dry conditions, following the manufacturer’s storage instructions. How do I select a rate?
Choose a rate according to crop demand, growing medium, container volume, season and any additional feeding. The published rates are general starting points for unfertilised substrates; trial changes on a small scale. Is this suitable for every crop?
No. Match the formulation and longevity to the crop, growing period and feeding requirements. How does temperature affect nutrient release?
Nutrient release generally speeds up at higher growing-medium temperatures and slows at lower temperatures.
ICL Osmocote Pro 12-14 Months 18-9-10 2MgO+TE 25kg
14476
£144.76
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ICL Osmocote Pro 12-14 Months 18-9-10 2MgO+TE 25kg
14476
£144.76
Unit price per
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ICL Osmocote Pro 12-14 Months 18-9-10 2MgO+TE 25kg is a professional Osmocote Pro controlled-release fertiliser formulated for incorporation into growing media for container nursery stock.
Its resin-coated nutrients provide a measured supply over a nominal 12–14-month period at 21°C, helping growers match fertiliser longevity to their crop cycle.
Key benefits
- Fully coated NPK, magnesium and trace elements
- Predictable release for container crops
- Useful in nursery nutrition programmes alongside appropriately adjusted water-soluble feeding
- 12–14-month nominal longevity at 21°C
- 25 kg bag
Professional applications
Suitable for incorporation into growing media for container nursery stock. Plan nutrition around crop demand, irrigation water, substrate properties and any supplementary feeding.
How to apply
Mix granules evenly through the growing medium before potting, following the current manufacturer instructions. ICL advises against dibbling for the short-duration Pro variants; check the current instructions for the exact product before choosing any alternative application method.
Application rates & nutrient management
Container nursery stock: 3–4 g/L (light), 4–5 g/L (normal), 5–6 g/L (heavy).
Manufacturer rates are general recommendations for unfertilised substrates. Adjust to local growing conditions and other nutrient inputs. Trial programme changes on a small scale before wider adoption.
Storage & handling
Keep partly used bags sealed and store in dry conditions. Follow current ICL product information and safety guidance.
Technical specifications
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Osmocote Pro controlled-release fertiliser |
| NPK (oxide basis) | 18-9-10 |
| Magnesium | 2% MgO |
| Trace elements | Included |
| Nominal longevity | 12–14 months at 21°C |
| Pack size | 25 kg |
| Typical application | incorporation into growing media for container nursery stock |
| Manufacturer guidance | Container nursery stock: 3–4 g/L (light), 4–5 g/L (normal), 5–6 g/L (heavy). |
Frequently asked questions
What is this fertiliser used for?
It is designed for incorporation into growing media for container nursery stock. What does the stated longevity mean?
ICL rates this product at 12–14 months at a growing-medium temperature of 21°C. Higher temperatures generally shorten the release period; lower temperatures extend it. Can it be combined with liquid feeding?
Yes, where the crop programme calls for it. Reduce the controlled-release fertiliser rate appropriately when adding water-soluble nutrients to avoid excessive total feeding. How should unused product be stored?
Reseal opened bags and store in dry conditions, following the manufacturer’s storage instructions. How do I select a rate?
Choose a rate according to crop demand, growing medium, container volume, season and any additional feeding. The published rates are general starting points for unfertilised substrates; trial changes on a small scale. Is this suitable for every crop?
No. Match the formulation and longevity to the crop, growing period and feeding requirements. How does temperature affect nutrient release?
Nutrient release generally speeds up at higher growing-medium temperatures and slows at lower temperatures.
ICL Universol Hard Water 211 25kg is a professional water-soluble fertiliser for nitrogen-led growth feeding in hard irrigation water with elevated bicarbonates.
With a declared analysis of 23-10-10 + 2% MgO + trace elements, this formulation allows growers to select nutrition for a specific crop stage and irrigation-water profile.
ICL's Universol range uses its Bright Solution System and colour-coded formulations to help professional growers prepare consistent feeding programmes. Supplied in a 25kg bag.
Key benefits
- Declared NPK analysis: 23-10-10
- Includes 2% magnesium oxide and trace elements
- Water-soluble nutrition for professional horticultural feeding programmes
- Formulation selected for nitrogen-led growth feeding in hard irrigation water with elevated bicarbonates
- 25kg commercial bag
Where this formulation fits
Use Hard Water 211 for nitrogen-led growth feeding in hard irrigation water with elevated bicarbonates. Crop response depends on the species, growth stage, root-zone conditions and the balance of nutrients already supplied by the growing medium and irrigation water.
This Hard Water product is designed for water with elevated bicarbonate levels; it should not be treated as interchangeable with a soft-water formulation.
Preparing & applying the feed
Dissolve the fertiliser in water using the current ICL mixing and application guidance for the product and your crop. Check irrigation-water analysis, including alkalinity and EC, when setting a fertigation programme.
Monitor stock solution clarity, feed EC and pH, crop growth and drainage. Avoid assuming a single concentration is appropriate for all crops or irrigation systems. Check concentrated stock-tank compatibility before mixing with other fertilisers, especially calcium-containing products.
Managing a professional nutrition programme
Consider how this water-soluble feed complements any controlled-release fertiliser already present in the substrate. Review nutrition as crops establish, grow and finish, rather than relying on a fixed recipe for the entire production period.
Store sealed in a dry area, protect from moisture and follow the current product label and safety information when handling fertilisers.
ICL Universol Hard Water 211 25kg product details
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Universol Hard Water |
| Formulation | Hard Water 211 |
| NPK (N–P₂O₅–K₂O) | 23-10-10 |
| Magnesium oxide (MgO) | 2% |
| Micronutrients | Trace elements (TE) |
| Bag size | 25kg |
| Primary application | nitrogen-led growth feeding in hard irrigation water with elevated bicarbonates |
ICL Universol Hard Water 211 25kg FAQs
What is the NPK analysis?
The declared NPK analysis is 23-10-10 (N–P₂O₅–K₂O), with 2% MgO and trace elements. When is this formulation most useful?
It is designed for nitrogen-led growth feeding in hard irrigation water with elevated bicarbonates. Select it in the context of your wider nutrition programme. Can I use it through fertigation?
Universol is a water-soluble fertiliser range used in professional feeding programmes. Confirm your irrigation equipment, stock-tank dilution and water quality are suitable. How do I choose a feeding concentration?
Base the concentration on crop demand, water analysis, substrate EC and the current manufacturer recommendations; monitor the feed solution and crop response. Can it be mixed with other fertilisers?
Do not assume all products are compatible in a concentrated stock tank. Follow the ICL product-specific mixing guidance and conduct a compatibility check before changing the programme. How should I store an opened bag?
Keep it sealed in a cool, dry place and prevent moisture entering the bag. Is this suitable for rainwater or very soft water?
This formulation is developed for hard irrigation water. Check water alkalinity and consult ICL guidance before using it with soft or rainwater.
ICL Osmocote Pro 5–6M 19-9-10 + 2MgO + TE - 25kg
13636
£136.36
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ICL Osmocote Pro 5–6M 19-9-10 + 2MgO + TE - 25kg
13636
£136.36
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ICL Osmocote Pro 5–6M is a professional controlled-release fertiliser with an NPK analysis of 19-9-10, 2% MgO and trace elements, supplied in a 25kg bag.
Its fully coated nutrient granules are designed to provide sustained nutrition over a predefined 5–6 months longevity period, making this version suited to professional container production where the crop cycle matches the stated release period.
Key benefits
- Controlled-release longevity: 5–6 months
- NPK analysis: 19-9-10
- Magnesium: 2% MgO
- Includes trace elements
- Fully coated controlled-release fertiliser
- Professional 25kg bag
Verified nutrient analysis
The current ICL product information states 19% total nitrogen, 9% P₂O₅, 10% K₂O and 2% MgO, together with trace elements. This page uses the current 19-9-10 analysis rather than relying on older or market-specific product information.
For medium-duration container production
ICL specifies a 5–6 month longevity for this Osmocote Pro formulation. This makes it suitable for professional container crops where sustained nutrition is required across a medium-duration production cycle, subject to crop requirements and growing conditions.
Using controlled-release fertiliser
Choose the product longevity and application rate according to crop species, container size, production period, growing-medium fertility, irrigation regime and supplementary feeding programme. Controlled-release fertiliser should be distributed consistently through or applied to the growing medium using a method appropriate to the crop and production system.
Avoid damaging coated granules during mechanical handling or application, as damage to the coating can alter nutrient release.
Temperature & nutrient release
Controlled-release fertiliser performance is influenced by growing conditions, particularly temperature. Crop nutrient demand also changes with growth rate, irrigation and season, so monitor crop response rather than assuming the stated longevity alone guarantees the correct nutrition programme.
Integrating with irrigation & water-soluble feeding
Account for nutrients already supplied by irrigation water, growing media and any supplementary fertiliser. Where water-soluble feeds are also used, adjust the overall programme to avoid unnecessary nutrient loading.
Storage & handling
Store fertiliser dry and protected from contamination and physical damage. Follow the current ICL product information and safety data sheet for handling, application and storage requirements.
ICL Osmocote Pro 5–6M 19-9-10 + 2MgO + TE - 25kg product details
| Brand | ICL |
|---|---|
| Range | Osmocote Pro |
| Product type | Controlled-release fertiliser |
| Longevity | 5–6 months |
| NPK | 19-9-10 |
| Magnesium | 2% MgO |
| Trace elements | Yes |
| Pack size | 25kg |
ICL Osmocote Pro 5–6M 19-9-10 + 2MgO + TE - 25kg FAQs
What is the stated longevity?
This version has a stated controlled-release longevity of 5–6 months. What is the NPK analysis?
The current ICL product information states 19-9-10. Does it contain magnesium?
Yes. The stated analysis includes 2% MgO. Does Osmocote Pro contain trace elements?
Yes. This formulation includes trace elements. Is the 25kg bag the selling unit?
Yes. This product is supplied as one 25kg bag. How do I choose an application rate?
Base the rate on the crop, container, growing medium, production period and wider feeding programme, following current ICL guidance. Does temperature affect nutrient release?
Yes. Controlled-release fertiliser performance is influenced by growing conditions, including temperature. Can it be used alongside water-soluble fertiliser?
It can form part of a wider nutrition programme, but account for all nutrient sources and avoid unnecessary overfeeding. Can coated granules be damaged?
Yes. Avoid crushing or damaging the coating during handling or application because this can affect nutrient release. Where should I check current technical guidance?
Use the current ICL product information and safety data sheet for the exact product and intended crop.
ICL Osmocote Pro 3–4M 19-9-10 + 2MgO + TE - 25kg
13206
£132.06
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ICL Osmocote Pro 3–4M 19-9-10 + 2MgO + TE - 25kg
13206
£132.06
Unit price per
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ICL Osmocote Pro 3–4M is a professional controlled-release fertiliser with an NPK analysis of 19-9-10, 2% MgO and trace elements, supplied in a 25kg bag.
Its fully coated nutrient granules are designed to provide sustained nutrition over a predefined 3–4 months longevity period, making this version suited to professional container production where the crop cycle matches the stated release period.
Key benefits
- Controlled-release longevity: 3–4 months
- NPK analysis: 19-9-10
- Magnesium: 2% MgO
- Includes trace elements
- Fully coated controlled-release fertiliser
- Professional 25kg bag
Verified nutrient analysis
The current ICL product information states 19% total nitrogen, 9% P₂O₅, 10% K₂O and 2% MgO, together with trace elements. This page uses the current 19-9-10 analysis rather than relying on older or market-specific product information.
For shorter crop cycles
ICL describes Osmocote Pro 3–4M as a controlled-release fertiliser for short crop cycles and rapidly growing plant material. Its 3–4 month longevity can make it appropriate where the production period is relatively short and a longer-duration fertiliser would extend beyond the intended crop cycle.
Using controlled-release fertiliser
Choose the product longevity and application rate according to crop species, container size, production period, growing-medium fertility, irrigation regime and supplementary feeding programme. Controlled-release fertiliser should be distributed consistently through or applied to the growing medium using a method appropriate to the crop and production system.
Avoid damaging coated granules during mechanical handling or application, as damage to the coating can alter nutrient release.
Temperature & nutrient release
Controlled-release fertiliser performance is influenced by growing conditions, particularly temperature. Crop nutrient demand also changes with growth rate, irrigation and season, so monitor crop response rather than assuming the stated longevity alone guarantees the correct nutrition programme.
Integrating with irrigation & water-soluble feeding
Account for nutrients already supplied by irrigation water, growing media and any supplementary fertiliser. Where water-soluble feeds are also used, adjust the overall programme to avoid unnecessary nutrient loading.
Storage & handling
Store fertiliser dry and protected from contamination and physical damage. Follow the current ICL product information and safety data sheet for handling, application and storage requirements.
ICL Osmocote Pro 3–4M 19-9-10 + 2MgO + TE - 25kg product details
| Brand | ICL |
|---|---|
| Range | Osmocote Pro |
| Product type | Controlled-release fertiliser |
| Longevity | 3–4 months |
| NPK | 19-9-10 |
| Magnesium | 2% MgO |
| Trace elements | Yes |
| Pack size | 25kg |
ICL Osmocote Pro 3–4M 19-9-10 + 2MgO + TE - 25kg FAQs
What is the stated longevity?
This version has a stated controlled-release longevity of 3–4 months. What is the NPK analysis?
The current ICL product information states 19-9-10. Does it contain magnesium?
Yes. The stated analysis includes 2% MgO. Does Osmocote Pro contain trace elements?
Yes. This formulation includes trace elements. Is the 25kg bag the selling unit?
Yes. This product is supplied as one 25kg bag. How do I choose an application rate?
Base the rate on the crop, container, growing medium, production period and wider feeding programme, following current ICL guidance. Does temperature affect nutrient release?
Yes. Controlled-release fertiliser performance is influenced by growing conditions, including temperature. Can it be used alongside water-soluble fertiliser?
It can form part of a wider nutrition programme, but account for all nutrient sources and avoid unnecessary overfeeding. Can coated granules be damaged?
Yes. Avoid crushing or damaging the coating during handling or application because this can affect nutrient release. Where should I check current technical guidance?
Use the current ICL product information and safety data sheet for the exact product and intended crop.
ICL Osmocote Exact Tablet 5-6 Months 14-8-11 2MgO+TE 5.0g 7.5kg
12669
£126.69
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ICL Osmocote Exact Tablet 5-6 Months 14-8-11 2MgO+TE 5.0g 7.5kg
12669
£126.69
Unit price per
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ICL Osmocote Exact Tablet 5-6 Months 14-8-11 2MgO+TE 5.0g 7.5kg is a professional Osmocote Exact controlled-release fertiliser tablet formulated for precise nutrition dosing of individual pots, containers and hanging baskets.
Its resin-coated nutrients provide a measured supply over a nominal 5–6-month period at 21°C, helping growers match fertiliser longevity to their crop cycle.
Key benefits
- 5 g tablet for consistent per-container dosing
- Cone-shaped tablet is easy to insert
- 14-8-11 + 2MgO and trace elements
- 5–6-month nominal longevity at 21°C
- 7.5 kg pack of 5 g tablets
Professional applications
Suitable for precise nutrition dosing of individual pots, containers and hanging baskets. Plan nutrition around crop demand, irrigation water, substrate properties and any supplementary feeding.
How to apply
Push tablets fully into the growing medium. In hanging baskets, position tablets around the plant; under drip irrigation, ICL recommends positioning beneath the dripper. The water-soluble adhesive breaks down after watering.
Application rates & nutrient management
Container nursery stock and pot plants: 3–4 g/L; hanging baskets: 3–5 g/L (manufacturer guidance for unfertilised substrates).
Manufacturer rates are general recommendations for unfertilised substrates. Adjust to local growing conditions and other nutrient inputs. Trial programme changes on a small scale before wider adoption.
Storage & handling
Keep partly used bags sealed and store in dry conditions. Follow current ICL product information and safety guidance.
Technical specifications
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Osmocote Exact controlled-release fertiliser tablet |
| NPK (oxide basis) | 14-8-11 |
| Magnesium | 2% MgO |
| Trace elements | Included |
| Nominal longevity | 5–6 months at 21°C |
| Pack size | 7.5 kg |
| Tablet size | 5 g |
| Typical application | precise nutrition dosing of individual pots, containers and hanging baskets |
| Manufacturer guidance | Container nursery stock and pot plants: 3–4 g/L; hanging baskets: 3–5 g/L (manufacturer guidance for unfertilised substrates). |
Frequently asked questions
What is this fertiliser used for?
It is designed for precise nutrition dosing of individual pots, containers and hanging baskets. What does the stated longevity mean?
ICL rates this product at 5–6 months at a growing-medium temperature of 21°C. Higher temperatures generally shorten the release period; lower temperatures extend it. Can it be combined with liquid feeding?
Yes, where the crop programme calls for it. Reduce the controlled-release fertiliser rate appropriately when adding water-soluble nutrients to avoid excessive total feeding. How should unused product be stored?
Reseal opened bags and store in dry conditions, following the manufacturer’s storage instructions. How do I select a rate?
Choose a rate according to crop demand, growing medium, container volume, season and any additional feeding. The published rates are general starting points for unfertilised substrates; trial changes on a small scale. How are the tablets applied?
Push the tablets fully into the growing medium. For drip-irrigated pots, position beneath the dripper. How many tablets should be used per pot?
Calculate the total grams required for the pot volume and crop, then select a whole number of 5 g tablets that matches the feeding plan. ICL provides a 3 L pot example using three 5 g tablets for a 15 g total.
ICL Universol Yellow 25kg is a professional water-soluble fertiliser for starter nutrition following potting, supporting early root and shoot development.
With a declared analysis of 12-30-12 + 2.2% MgO + trace elements, this formulation allows growers to select nutrition for a specific crop stage and irrigation-water profile.
ICL's Universol range uses its Bright Solution System and colour-coded formulations to help professional growers prepare consistent feeding programmes. Supplied in a 25kg bag.
Key benefits
- Declared NPK analysis: 12-30-12
- Includes 2.2% magnesium oxide and trace elements
- Water-soluble nutrition for professional horticultural feeding programmes
- Formulation selected for starter nutrition following potting, supporting early root and shoot development
- 25kg commercial bag
Where this formulation fits
Use Yellow for starter nutrition following potting, supporting early root and shoot development. Crop response depends on the species, growth stage, root-zone conditions and the balance of nutrients already supplied by the growing medium and irrigation water.
Where hard or soft irrigation water presents particular challenges, compare the dedicated Universol Hard Water and Soft Water ranges before selecting a feed.
Preparing & applying the feed
Dissolve the fertiliser in water using the current ICL mixing and application guidance for the product and your crop. Check irrigation-water analysis, including alkalinity and EC, when setting a fertigation programme.
Monitor stock solution clarity, feed EC and pH, crop growth and drainage. Avoid assuming a single concentration is appropriate for all crops or irrigation systems. Check concentrated stock-tank compatibility before mixing with other fertilisers, especially calcium-containing products.
Managing a professional nutrition programme
Consider how this water-soluble feed complements any controlled-release fertiliser already present in the substrate. Review nutrition as crops establish, grow and finish, rather than relying on a fixed recipe for the entire production period.
Store sealed in a dry area, protect from moisture and follow the current product label and safety information when handling fertilisers.
ICL Universol Yellow 25kg product details
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Universol Standard |
| Formulation | Yellow |
| NPK (N–P₂O₅–K₂O) | 12-30-12 |
| Magnesium oxide (MgO) | 2.2% |
| Micronutrients | Trace elements (TE) |
| Bag size | 25kg |
| Primary application | starter nutrition following potting, supporting early root and shoot development |
ICL Universol Yellow 25kg FAQs
What is the NPK analysis?
The declared NPK analysis is 12-30-12 (N–P₂O₅–K₂O), with 2.2% MgO and trace elements. When is this formulation most useful?
It is designed for starter nutrition following potting, supporting early root and shoot development. Select it in the context of your wider nutrition programme. Can I use it through fertigation?
Universol is a water-soluble fertiliser range used in professional feeding programmes. Confirm your irrigation equipment, stock-tank dilution and water quality are suitable. How do I choose a feeding concentration?
Base the concentration on crop demand, water analysis, substrate EC and the current manufacturer recommendations; monitor the feed solution and crop response. Can it be mixed with other fertilisers?
Do not assume all products are compatible in a concentrated stock tank. Follow the ICL product-specific mixing guidance and conduct a compatibility check before changing the programme. How should I store an opened bag?
Keep it sealed in a cool, dry place and prevent moisture entering the bag. Does water quality affect product selection?
Yes. Irrigation-water hardness, bicarbonate content and existing nutrients can affect which Universol formulation is appropriate.
ICL Universol Violet 25kg is a professional water-soluble fertiliser for high-potassium feeding for compact growth and flowering.
With a declared analysis of 10-10-30 + 3.3% MgO + trace elements, this formulation allows growers to select nutrition for a specific crop stage and irrigation-water profile.
ICL's Universol range uses its Bright Solution System and colour-coded formulations to help professional growers prepare consistent feeding programmes. Supplied in a 25kg bag.
Key benefits
- Declared NPK analysis: 10-10-30
- Includes 3.3% magnesium oxide and trace elements
- Water-soluble nutrition for professional horticultural feeding programmes
- Formulation selected for high-potassium feeding for compact growth and flowering
- 25kg commercial bag
Where this formulation fits
Use Violet for high-potassium feeding for compact growth and flowering. Crop response depends on the species, growth stage, root-zone conditions and the balance of nutrients already supplied by the growing medium and irrigation water.
Where hard or soft irrigation water presents particular challenges, compare the dedicated Universol Hard Water and Soft Water ranges before selecting a feed.
Preparing & applying the feed
Dissolve the fertiliser in water using the current ICL mixing and application guidance for the product and your crop. Check irrigation-water analysis, including alkalinity and EC, when setting a fertigation programme.
Monitor stock solution clarity, feed EC and pH, crop growth and drainage. Avoid assuming a single concentration is appropriate for all crops or irrigation systems. Check concentrated stock-tank compatibility before mixing with other fertilisers, especially calcium-containing products.
Managing a professional nutrition programme
Consider how this water-soluble feed complements any controlled-release fertiliser already present in the substrate. Review nutrition as crops establish, grow and finish, rather than relying on a fixed recipe for the entire production period.
Store sealed in a dry area, protect from moisture and follow the current product label and safety information when handling fertilisers.
ICL Universol Violet 25kg product details
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Universol Standard |
| Formulation | Violet |
| NPK (N–P₂O₅–K₂O) | 10-10-30 |
| Magnesium oxide (MgO) | 3.3% |
| Micronutrients | Trace elements (TE) |
| Bag size | 25kg |
| Primary application | high-potassium feeding for compact growth and flowering |
ICL Universol Violet 25kg FAQs
What is the NPK analysis?
The declared NPK analysis is 10-10-30 (N–P₂O₅–K₂O), with 3.3% MgO and trace elements. When is this formulation most useful?
It is designed for high-potassium feeding for compact growth and flowering. Select it in the context of your wider nutrition programme. Can I use it through fertigation?
Universol is a water-soluble fertiliser range used in professional feeding programmes. Confirm your irrigation equipment, stock-tank dilution and water quality are suitable. How do I choose a feeding concentration?
Base the concentration on crop demand, water analysis, substrate EC and the current manufacturer recommendations; monitor the feed solution and crop response. Can it be mixed with other fertilisers?
Do not assume all products are compatible in a concentrated stock tank. Follow the ICL product-specific mixing guidance and conduct a compatibility check before changing the programme. How should I store an opened bag?
Keep it sealed in a cool, dry place and prevent moisture entering the bag. Does water quality affect product selection?
Yes. Irrigation-water hardness, bicarbonate content and existing nutrients can affect which Universol formulation is appropriate.
ICL Universol Orange 25kg is a professional water-soluble fertiliser for pot and bedding crops where a higher-potassium finishing feed is required.
With a declared analysis of 16-5-25 + 3.4% MgO + trace elements, this formulation allows growers to select nutrition for a specific crop stage and irrigation-water profile.
ICL's Universol range uses its Bright Solution System and colour-coded formulations to help professional growers prepare consistent feeding programmes. Supplied in a 25kg bag.
Key benefits
- Declared NPK analysis: 16-5-25
- Includes 3.4% magnesium oxide and trace elements
- Water-soluble nutrition for professional horticultural feeding programmes
- Formulation selected for pot and bedding crops where a higher-potassium finishing feed is required
- 25kg commercial bag
Where this formulation fits
Use Orange for pot and bedding crops where a higher-potassium finishing feed is required. Crop response depends on the species, growth stage, root-zone conditions and the balance of nutrients already supplied by the growing medium and irrigation water.
Where hard or soft irrigation water presents particular challenges, compare the dedicated Universol Hard Water and Soft Water ranges before selecting a feed.
Preparing & applying the feed
Dissolve the fertiliser in water using the current ICL mixing and application guidance for the product and your crop. Check irrigation-water analysis, including alkalinity and EC, when setting a fertigation programme.
Monitor stock solution clarity, feed EC and pH, crop growth and drainage. Avoid assuming a single concentration is appropriate for all crops or irrigation systems. Check concentrated stock-tank compatibility before mixing with other fertilisers, especially calcium-containing products.
Managing a professional nutrition programme
Consider how this water-soluble feed complements any controlled-release fertiliser already present in the substrate. Review nutrition as crops establish, grow and finish, rather than relying on a fixed recipe for the entire production period.
Store sealed in a dry area, protect from moisture and follow the current product label and safety information when handling fertilisers.
ICL Universol Orange 25kg product details
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Universol Standard |
| Formulation | Orange |
| NPK (N–P₂O₅–K₂O) | 16-5-25 |
| Magnesium oxide (MgO) | 3.4% |
| Micronutrients | Trace elements (TE) |
| Bag size | 25kg |
| Primary application | pot and bedding crops where a higher-potassium finishing feed is required |
ICL Universol Orange 25kg FAQs
What is the NPK analysis?
The declared NPK analysis is 16-5-25 (N–P₂O₅–K₂O), with 3.4% MgO and trace elements. When is this formulation most useful?
It is designed for pot and bedding crops where a higher-potassium finishing feed is required. Select it in the context of your wider nutrition programme. Can I use it through fertigation?
Universol is a water-soluble fertiliser range used in professional feeding programmes. Confirm your irrigation equipment, stock-tank dilution and water quality are suitable. How do I choose a feeding concentration?
Base the concentration on crop demand, water analysis, substrate EC and the current manufacturer recommendations; monitor the feed solution and crop response. Can it be mixed with other fertilisers?
Do not assume all products are compatible in a concentrated stock tank. Follow the ICL product-specific mixing guidance and conduct a compatibility check before changing the programme. How should I store an opened bag?
Keep it sealed in a cool, dry place and prevent moisture entering the bag. Does water quality affect product selection?
Yes. Irrigation-water hardness, bicarbonate content and existing nutrients can affect which Universol formulation is appropriate.
ICL Universol Hard Water 225 25kg is a professional water-soluble fertiliser for high-potassium feeding in hard irrigation water with elevated bicarbonates.
With a declared analysis of 11-10-28 + 2% MgO + trace elements, this formulation allows growers to select nutrition for a specific crop stage and irrigation-water profile.
ICL's Universol range uses its Bright Solution System and colour-coded formulations to help professional growers prepare consistent feeding programmes. Supplied in a 25kg bag.
Key benefits
- Declared NPK analysis: 11-10-28
- Includes 2% magnesium oxide and trace elements
- Water-soluble nutrition for professional horticultural feeding programmes
- Formulation selected for high-potassium feeding in hard irrigation water with elevated bicarbonates
- 25kg commercial bag
Where this formulation fits
Use Hard Water 225 for high-potassium feeding in hard irrigation water with elevated bicarbonates. Crop response depends on the species, growth stage, root-zone conditions and the balance of nutrients already supplied by the growing medium and irrigation water.
This Hard Water product is designed for water with elevated bicarbonate levels; it should not be treated as interchangeable with a soft-water formulation.
Preparing & applying the feed
Dissolve the fertiliser in water using the current ICL mixing and application guidance for the product and your crop. Check irrigation-water analysis, including alkalinity and EC, when setting a fertigation programme.
Monitor stock solution clarity, feed EC and pH, crop growth and drainage. Avoid assuming a single concentration is appropriate for all crops or irrigation systems. Check concentrated stock-tank compatibility before mixing with other fertilisers, especially calcium-containing products.
Managing a professional nutrition programme
Consider how this water-soluble feed complements any controlled-release fertiliser already present in the substrate. Review nutrition as crops establish, grow and finish, rather than relying on a fixed recipe for the entire production period.
Store sealed in a dry area, protect from moisture and follow the current product label and safety information when handling fertilisers.
ICL Universol Hard Water 225 25kg product details
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Universol Hard Water |
| Formulation | Hard Water 225 |
| NPK (N–P₂O₅–K₂O) | 11-10-28 |
| Magnesium oxide (MgO) | 2% |
| Micronutrients | Trace elements (TE) |
| Bag size | 25kg |
| Primary application | high-potassium feeding in hard irrigation water with elevated bicarbonates |
ICL Universol Hard Water 225 25kg FAQs
What is the NPK analysis?
The declared NPK analysis is 11-10-28 (N–P₂O₅–K₂O), with 2% MgO and trace elements. When is this formulation most useful?
It is designed for high-potassium feeding in hard irrigation water with elevated bicarbonates. Select it in the context of your wider nutrition programme. Can I use it through fertigation?
Universol is a water-soluble fertiliser range used in professional feeding programmes. Confirm your irrigation equipment, stock-tank dilution and water quality are suitable. How do I choose a feeding concentration?
Base the concentration on crop demand, water analysis, substrate EC and the current manufacturer recommendations; monitor the feed solution and crop response. Can it be mixed with other fertilisers?
Do not assume all products are compatible in a concentrated stock tank. Follow the ICL product-specific mixing guidance and conduct a compatibility check before changing the programme. How should I store an opened bag?
Keep it sealed in a cool, dry place and prevent moisture entering the bag. Is this suitable for rainwater or very soft water?
This formulation is developed for hard irrigation water. Check water alkalinity and consult ICL guidance before using it with soft or rainwater.
ICL Universol Green 25kg is a professional water-soluble fertiliser for nitrogen-led vegetative growth during active crop development.
With a declared analysis of 23-6-10 + 2.7% MgO + trace elements, this formulation allows growers to select nutrition for a specific crop stage and irrigation-water profile.
ICL's Universol range uses its Bright Solution System and colour-coded formulations to help professional growers prepare consistent feeding programmes. Supplied in a 25kg bag.
Key benefits
- Declared NPK analysis: 23-6-10
- Includes 2.7% magnesium oxide and trace elements
- Water-soluble nutrition for professional horticultural feeding programmes
- Formulation selected for nitrogen-led vegetative growth during active crop development
- 25kg commercial bag
Where this formulation fits
Use Green for nitrogen-led vegetative growth during active crop development. Crop response depends on the species, growth stage, root-zone conditions and the balance of nutrients already supplied by the growing medium and irrigation water.
Where hard or soft irrigation water presents particular challenges, compare the dedicated Universol Hard Water and Soft Water ranges before selecting a feed.
Preparing & applying the feed
Dissolve the fertiliser in water using the current ICL mixing and application guidance for the product and your crop. Check irrigation-water analysis, including alkalinity and EC, when setting a fertigation programme.
Monitor stock solution clarity, feed EC and pH, crop growth and drainage. Avoid assuming a single concentration is appropriate for all crops or irrigation systems. Check concentrated stock-tank compatibility before mixing with other fertilisers, especially calcium-containing products.
Managing a professional nutrition programme
Consider how this water-soluble feed complements any controlled-release fertiliser already present in the substrate. Review nutrition as crops establish, grow and finish, rather than relying on a fixed recipe for the entire production period.
Store sealed in a dry area, protect from moisture and follow the current product label and safety information when handling fertilisers.
ICL Universol Green 25kg product details
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Universol Standard |
| Formulation | Green |
| NPK (N–P₂O₅–K₂O) | 23-6-10 |
| Magnesium oxide (MgO) | 2.7% |
| Micronutrients | Trace elements (TE) |
| Bag size | 25kg |
| Primary application | nitrogen-led vegetative growth during active crop development |
ICL Universol Green 25kg FAQs
What is the NPK analysis?
The declared NPK analysis is 23-6-10 (N–P₂O₅–K₂O), with 2.7% MgO and trace elements. When is this formulation most useful?
It is designed for nitrogen-led vegetative growth during active crop development. Select it in the context of your wider nutrition programme. Can I use it through fertigation?
Universol is a water-soluble fertiliser range used in professional feeding programmes. Confirm your irrigation equipment, stock-tank dilution and water quality are suitable. How do I choose a feeding concentration?
Base the concentration on crop demand, water analysis, substrate EC and the current manufacturer recommendations; monitor the feed solution and crop response. Can it be mixed with other fertilisers?
Do not assume all products are compatible in a concentrated stock tank. Follow the ICL product-specific mixing guidance and conduct a compatibility check before changing the programme. How should I store an opened bag?
Keep it sealed in a cool, dry place and prevent moisture entering the bag. Does water quality affect product selection?
Yes. Irrigation-water hardness, bicarbonate content and existing nutrients can affect which Universol formulation is appropriate.
ICL Osmocote Exact Tablet 8-9 Months 14-8-11 2MgO+TE 5.0g 7.5kg
12905
£129.05
Unit price per
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ICL Osmocote Exact Tablet 8-9 Months 14-8-11 2MgO+TE 5.0g 7.5kg
12905
£129.05
Unit price per
Please sign in to see pricing
ICL Osmocote Exact Tablet 8-9 Months 14-8-11 2MgO+TE 5.0g 7.5kg is a professional Osmocote Exact controlled-release fertiliser tablet formulated for precise nutrition dosing of individual pots, containers and hanging baskets.
Its resin-coated nutrients provide a measured supply over a nominal 8–9-month period at 21°C, helping growers match fertiliser longevity to their crop cycle.
Key benefits
- 5 g tablet for consistent per-container dosing
- Cone-shaped tablet is easy to insert
- 14-8-11 + 2MgO and trace elements
- 8–9-month nominal longevity at 21°C
- 7.5 kg pack of 5 g tablets
Professional applications
Suitable for precise nutrition dosing of individual pots, containers and hanging baskets. Plan nutrition around crop demand, irrigation water, substrate properties and any supplementary feeding.
How to apply
Push tablets fully into the growing medium. In hanging baskets, position tablets around the plant; under drip irrigation, ICL recommends positioning beneath the dripper. The water-soluble adhesive breaks down after watering.
Application rates & nutrient management
Container nursery stock and pot plants: 4–5 g/L; hanging baskets: 4–6 g/L (manufacturer guidance for unfertilised substrates).
Manufacturer rates are general recommendations for unfertilised substrates. Adjust to local growing conditions and other nutrient inputs. Trial programme changes on a small scale before wider adoption.
Storage & handling
Keep partly used bags sealed and store in dry conditions. Follow current ICL product information and safety guidance.
Technical specifications
| Manufacturer | ICL Growing Solutions |
|---|---|
| Range | Osmocote Exact controlled-release fertiliser tablet |
| NPK (oxide basis) | 14-8-11 |
| Magnesium | 2% MgO |
| Trace elements | Included |
| Nominal longevity | 8–9 months at 21°C |
| Pack size | 7.5 kg |
| Tablet size | 5 g |
| Typical application | precise nutrition dosing of individual pots, containers and hanging baskets |
| Manufacturer guidance | Container nursery stock and pot plants: 4–5 g/L; hanging baskets: 4–6 g/L (manufacturer guidance for unfertilised substrates). |
Frequently asked questions
What is this fertiliser used for?
It is designed for precise nutrition dosing of individual pots, containers and hanging baskets. What does the stated longevity mean?
ICL rates this product at 8–9 months at a growing-medium temperature of 21°C. Higher temperatures generally shorten the release period; lower temperatures extend it. Can it be combined with liquid feeding?
Yes, where the crop programme calls for it. Reduce the controlled-release fertiliser rate appropriately when adding water-soluble nutrients to avoid excessive total feeding. How should unused product be stored?
Reseal opened bags and store in dry conditions, following the manufacturer’s storage instructions. How do I select a rate?
Choose a rate according to crop demand, growing medium, container volume, season and any additional feeding. The published rates are general starting points for unfertilised substrates; trial changes on a small scale. How are the tablets applied?
Push the tablets fully into the growing medium. For drip-irrigated pots, position beneath the dripper. How many tablets should be used per pot?
Calculate the total grams required for the pot volume and crop, then select a whole number of 5 g tablets that matches the feeding plan. ICL provides a 3 L pot example using three 5 g tablets for a 15 g total.
The ICL Osmocote collection offers a comprehensive range of professional plant nutrition and fertiliser solutions developed to support consistent, high-quality plant growth across commercial horticulture, nurseries and landscape planting projects. ICL is internationally recognised for its science-led approach to plant nutrition, delivering products that promote strong root development, balanced growth and improved crop performance throughout the growing cycle. This range supports a wide variety of applications, including container-grown nursery stock, bedding plants, shrubs, trees and ornamental crops, making it highly relevant for professional growers and landscaper supply programmes.
Supplied through specialist garden wholesalers and horticultural distributors, ICL products are trusted by growers and landscapers who require dependable, repeatable results in demanding production environments. Whether used during propagation, growing-on or finishing stages, these fertilisers and nutrition products integrate seamlessly with irrigation systems, growing media and wider crop care programmes. Including ICL within your garden supplies and plant nutrition offering ensures trade customers have access to proven, professional-grade solutions that enhance plant health, improve consistency and support efficient, scalable horticultural production.