Bulk substrate refers to a type of substrate that is used in the cultivation of mushrooms and other fungi. It is typically made up of a combination of ingredients such as spawn, peat moss, vermiculite, and/or perlite.
Weight – 3 LBS
Sterilized grain spawn bags are bags made of a filter material that are filled with a sterilized grain substrate, such as rye, millet, or wheat.
weight – 3LBS