Sinclair is one of the UK's leading suppliers of professional growing media and horticultural products. Trusted by commercial growers, nurseries and gardeners, Sinclair products are developed to deliver consistent performance, healthy plant growth and reliable cultivation results across a wide range of growing applications.

What is vermiculite used for?

Vermiculite is used to improve moisture retention, aeration and soil structure in seed composts, propagation mixes, potting composts and garden soils.

Can I use vermiculite for seed sowing?

Yes, fine vermiculite is commonly used for seed sowing as it helps maintain moisture around seeds and supports healthy germination.

Does vermiculite improve drainage?

Yes, vermiculite helps improve the overall structure of growing media while increasing aeration and moisture management.

Can I mix vermiculite with compost?

Yes, vermiculite can be mixed into composts and potting mixes to improve water retention and root zone aeration.

Is vermiculite suitable for propagation?

Absolutely. It is widely used in propagation mixes to encourage healthy root development and improve growing conditions for young plants.

What is the grain size of this vermiculite?

This product has a fine 1-3mm grain size, making it ideal for seed sowing, propagation and specialist growing media blends.