Gypsum for Mushroom Cultivation
MushroomSource offers Gypsum as substrate additive for mushroom cultivation.
Gypsum acts as a buffer and helps to maintain proper pH level of the substrate. It is also used in preparation of grain jars. You would need only a small amount, usually just 3-5% of the substrate weight.
Pick up of the Gypsum is available in Toronto and we can ship within Canada.
Granulated Gypsum - $4.95 + tax per pound (0.45 Kg)
Get as much or as little as you need.