Vermiculite is the mineral Mica, super-heated to expand much like an accordion. This mineral is often used in soil mixes to increase water holding. Many growers use vermiculite in their flats in order to create a micro environment that will protect seeds from air currents and insulate the seeds to provide uniform germination temperatures.
Part Number: Ferti-Lome-Vermiculite-8-Quart
3 In Stock.