When you are ready to start growing in bulk, our mushroom bulk casing bags and kits are the perfect solution. Our bags of casing mix for mushrooms make growing in bulk easier than ever! Our select mushroom casing comes fully hydrated and pasteurized, so they are ready to use right out of the bag. The mushroom bulk substrate is the next step to take after you’ve mastered growing in jars. If you grab one of our bulk substrate kits, you’ll have everything you need to create a mushroom harvest paradise.Here you’ll also find our manure bag mixes, our most effective creation to date. Our mushroom cultivation supplies increase mushroom size, potency, and flavor. If you want to get the most out of your growing, you’ll need the best products and equipment. Midwest Grow Kits has you covered!