Gro-Sure Vermiculite 10L is a horticultural growing-medium amendment that can help retain moisture and nutrients while keeping compost mixes workable. It is commonly used in seed-sowing and propagation mixes and can also be blended with potting compost where additional moisture retention is useful. Vermiculite supports growing-medium management but does not guarantee germination, nutrient uptake or better plant growth. Use the amount and method stated on the pack for the intended application.