. Substrate is the material that provides nourishment for that mushrooms (think of it as soil for fungi). When whole Reddit threads are dedicated to debating the ideal substrate product, substrate is typically composed of some sort of grain. This mushroom package is natural and non-gmo—and you can grow it https://buy-mushroom-kits-online36925.jts-blog.com/13613143/the-2-minute-rule-for-buy-mushroom-kits-online