What Is Coarse Grade Vermiculite?
What Is Coarse Grade Vermiculite? 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. What are the different grades of vermiculite?