Gro-Sure Vermiculite provides insulation for healthy seed germination.Encourages germination and strong healthy seedling growthHelps retain moisture and nutrientsProvides insulation for healthy seed germinationNaturally occurring lightweight materialCan be added to seed & cutting compost for additional benefitsGro-Sure Vermiculite is a This naturally occurring volcanic rock has been heated to high temperatures to produce lightweight, micro-porous granules. This is perfect for improving aeration, moisture retention and drainage, encouraging strong, healthy seedling growth and establishment.How to Use: For sowing seeds - When sowing seeds always following the directions on the seed packet. Seeds of all sizes can be raised in just Gro-Sure Vermiculite. Alternatively seeds can be raised in a 50:50 mix of Gro-Sure Seed & Cutting Compost and Gro-Sure Vermiculite. This is particularly beneficial for very small seeds. Sow seeds thinly and evenly, making sure they are not too deep in the compos