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Sinclair
5 products
5 products
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Sinclair Vermiculite Medium 100L
Sinclair Vermiculite is a naturally occurring, non-toxic mica mineral expanded under high heat to form a lightweight, sterile, laminated structure. Ideal for propagation and soil conditioning, it offers excellent water retention and aeration properties.
With a particle size range of 2.0–5.0mm and water holding capacity of 381ml per litre, it improves drainage while retaining moisture and nutrients at the root zone.
Vermiculite also acts as an insulator, helping to stabilise soil temperatures and protect delicate seedlings.
Perfect for professional growers and horticulturists seeking consistent, reliable performance in a growing medium.
Sinclair Vermiculite Fine 100L
Sinclair Vermiculite Fine is a premium, horticulturally graded mineral additive designed to improve soil structure, aeration, and moisture retention. With a fine 1–3mm particle size, it’s ideal for seed sowing, propagation, and delicate root systems.
This lightweight, sterile and non-toxic medium helps maintain consistent moisture levels, supports healthy root growth, and holds on to nutrients for gradual plant uptake. It also offers insulation from temperature fluctuations—perfect for seed trays, potting mixes, and greenhouse applications.
A professional choice for gardeners seeking reliable results and enhanced plant performance.
SINCLAIR Growmore 25kg (39 bags per pallet)
£42.00
Unit price perSINCLAIR Growmore 25kg (39 bags per pallet)
£42.00
Unit price perSinclair Growmore 25kg
A balanced, multi-purpose granular fertiliser with equal parts nitrogen, phosphate, and potassium (NPK 7-7-7). Ideal for flowers, fruit, vegetables, trees, and shrubs. Provides long-lasting nutrition to promote strong, healthy growth.
SINCLAIR Fish Blood and Bone 25kg (39 bags per pallet)
£28.60
Unit price perSINCLAIR Fish Blood and Bone 25kg (39 bags per pallet)
£28.60
Unit price perSINCLAIR Fish Blood and Bone 25kg
Sinclair Fish, Blood and Bone is a traditional, organic-based general-purpose plant food that promotes strong, healthy growth. Rich in natural nutrients with an NPK ratio of 3-9-3, it encourages robust root development, enhances flowering and fruiting, and supports overall plant vitality. It delivers consistent, reliable nutrition.
Supplied in professional pack sizes, this organic fertiliser meets the needs of growers seeking efficiency and results.
SINCLAIR Bonemeal 25kg (39 bags per pallet)
£25.00
Unit price perSINCLAIR Bonemeal 25kg (39 bags per pallet)
£25.00
Unit price perSINCLAIR Bonemeal 25kg
Sinclair Bonemeal is a natural, organic, slow-release fertiliser ideal for encouraging strong and healthy root development. With a high phosphorus content (NPK 3-9-0), it is especially effective when planting trees, shrubs, and herbaceous plants. It delivers consistent, reliable nutrition.
Supplied in professional pack sizes, this organic fertiliser meets the needs of growers seeking efficiency and results.
The Sinclair collection is built around two core needs in commercial horticulture: propagation performance and reliable, cost-effective nutrition. For growers, nurseries and landscaper supply buyers, Sinclair Vermiculite is a proven mineral additive used to improve rooting and early plant establishment. Available in Fine (1–3mm) for seed sowing and delicate root systems, and Medium (2–5mm) for broader propagation and soil conditioning, Sinclair vermiculite supports balanced moisture retention and aeration, helping reduce losses and improve uniformity across trays, modules and potting mixes.
Alongside propagation substrates, this page also includes Sinclair’s professional-grade fertilisers in 25kg trade packs, ideal for garden wholesalers, horticultural distributors and high-throughput growing operations. Sinclair Growmore 25kg provides a balanced NPK 7-7-7 for general feeding across flowers, fruit, vegetables, trees and shrubs, while Sinclair Fish Blood & Bone 25kg (NPK 3-9-3) supports root development, flowering and fruiting using an organic-based formula. For planting and establishment, Sinclair Bonemeal 25kg (NPK 3-9-0) delivers slow-release phosphorus to encourage strong root systems—especially useful for trees, shrubs and herbaceous planting. It’s a highly relevant, margin-friendly range for professional buyers who want dependable inputs that slot neatly into existing crop programmes and garden supply catalogues.