5-Pound Mushroom Grain Spawn Bags
Get started on your mushroom-growing journey with our premium mushroom grain spawn bags! We store our bulk grain spawn in superior-quality Unicorn bags made in the USA, with a validated 0.5-micron filter patch to let air in and contaminants out.
60% more spawn than your standard grain spawn bag!
100% ...
Reviews
4.9
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Bags look nice ...too early to tell...I hope the spores take...they are super viable and fresh.
T
Timothy · June 18, 2026
So far so good it’s been about 10 days since an inoculation and I’m getting mycelium in both bags. Thank you.
A
Anonymous · November 30, 2025
100% hit rate. It’s been a relief and given me some piece of mind. Great stuff!