Sinclair Vermiculite Medium 100L

Please sign in to see pricing

£27.00

Back in Stock

Sign up to be the first to know when it's back in stock.

Sinclair Vermiculite Medium 100L — Medium-grade expanded vermiculite for professional seed covering, propagation and growing-medium blending.

Selected for professional horticulture, nursery production and garden or landscape applications where the product suits the crop and growing conditions.

Key benefits

  • 2–5mm particle size, as specified by Sinclair
  • Manufacturer-stated water holding: 381ml per litre of vermiculite
  • Layered mineral structure helps retain water and soluble nutrients
  • Useful as a seed covering and to improve aeration in growing media

How medium vermiculite works

Expanded vermiculite is a lightweight mineral with a layered structure and cation-exchange properties. In an appropriate growing-medium blend it helps buffer moisture and retain soluble nutrients, while the medium grade provides additional structure.

Seed covering and propagation

Apply an appropriate light covering over sown seed where the crop requires it. Maintain even moisture and follow the species-specific sowing depth and germination conditions; do not bury light-germinating seed unnecessarily.

Blending into growing media

Choose the inclusion rate for the crop and substrate. Vermiculite holds water, so consider the effect on the finished mix rather than assuming it will always improve drainage.

Sinclair Vermiculite Medium 100L product details

Grade Medium
Particle size 2–5mm
Water holding (manufacturer figure) 381ml per litre
Bag size 100L
Manufacturer product reference FXS1730S

Sinclair Vermiculite Medium 100L FAQs

Is medium vermiculite suitable for covering seeds?

Yes. Sinclair identifies the medium grade for seed covering. Match the covering depth to the seed species.

What is the particle size?

The manufacturer specifies 2–5mm.

Does vermiculite hold nutrients?

Yes. Its layered mineral structure provides cation-exchange capacity, helping retain some soluble nutrients in a growing medium.

Is it the same as perlite?

No. Vermiculite generally contributes more moisture and nutrient retention, while perlite is commonly selected primarily to increase air space.

How much is supplied?

One 100L bag.

Pay with

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Klarna
  • Maestro
  • Mastercard
  • Shop Pay
  • Union Pay
  • Visa

Your transaction is protected with advanced security measures to keep your information confidential

Sinclair Vermiculite Medium 100L

Sinclair Vermiculite Medium 100L

£27.00

£27.00