A natural mineral product but different to Perlite, also expanded by heating to produce a plate like structure giving it a higher water holding capacity. Frequently used on its own for seed sowing or as a rooting medium, but can also be blended with peat, coir or loam. Vermiculite has natural insulation properties and can be used for frost protection.Medium Grade - All purpose for use in composts, cuttings etc.Ideal for bulb and tuber storage
