Bulk Pelletized Gypsum

Questions about how much gypsum to order? Check out the substrate calculator here.  Our gypsum comes in a pelletized form.  This makes it much easier to work with because it creates less dust and mess.  Gypsum is a highly recommended ingredient for grain spawn and monotub substrate for two reasons:   Gypsum provides calcium and sulfur, two essential nutrients that mycelium crave.  Gypsum helps to prevent grain and substrate from clumping (sticking together). For grain spawn, 2% (by weight) of gypsum is typically added. For coco coir/vermiculite/gypsum substrate, 5% (by weight) is typically added.  Looking for the rest of your CVG ingredients? Coco coir is here, and vermiculite is here!