Vermiculite is used in soilless substrate mixes to provide drainage and help retain necessary water for plant growth. It can be mixed with coconut coir media to produce a homemade blend of aquaponic and hydroponic seedling substrate. Coarse vermiculite improves soil's ability to nourish plants by improving its water retention and aeration. Vermiculite is a natural mica mineral that expands under extreme heat. Loosens soil, allowing roots to spread and grow. A great option for seed germination and cutting propagation. Chemically inert, does not deteriorate and has an essentially neutral pH. As vermiculite is sterile, it is free of disease, weed seeds and insects. Nontoxic, safe and economical to use. One 4 cu. ft. bag will fill approximately 64 one-gallon nursery pots.
