It helps with drainage and aids aeration in seed composts. It also helps create a more open textured compost.
This handy pack is part of the RHS Gardeners Collection. This is the only range of horticultural grits and sands endorsed by the Royal Horticultural Society.
Main features: Horticultural lime free washed fine grade silver sand Endorsed by the RHS Suitable for Outdoor use.
Ideal Uses: Mixing with composts for seed sowing & root cuttings Marking out seed beds Greenhouse capilliary benches.