GREAT PRICES, FAST SHIPPING, QUALITY PRODUCT
Bruise Blue is the no-nonsense choice for serious shroomers: the best prices on the substrates and grain you actually use, with true bulk ordering that scales as you do.
Every sterile sub and grain bag starts at $9.99
Every bag is autoclave-sterilized and QC-checked for a clean, consistent start—so you can focus on dialing in your process, not fighting contam.
Need it now? Our fast, reliable shipping gets fresh bags to your door quickly, packed to handle the miles. Whether you’re spawning a monotub or loading up a grow room, Bruise Blue delivers sterile product, rock-solid consistency, and wallet-friendly pricing—exactly what a production-minded grower expects.
OPTIMA Organic Grain Bag - Sterilized with Injection Port
Our OPTIMA organic sterilized grain bag is built for one thing: fast, aggressive colonization.
Formulated by longtime mushroom growers, each 3 lb bag is loaded with our proprietary blend of hydrated, nutrient-rich organic millet and wheat berries. Every bag comes with a self-healing injection port for easy use with spore or liquid culture syringes, plus a 0.2 micron filter patch to keep airborne trash out while still letting your mycelium breathe.
Note: injection port color may vary. It all works the same—don’t overthink it.
Recommended use
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Use 1 lb of fully colonized grain spawn for every 5 lbs of bulk substrate.
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For these 3 lb injection-port bags, we recommend 2.5–5 ccs of solution per bag.
(More details in the “Inoculation & Colonization” section below on the product page.)
Why add millet?
Short answer: cleaner, faster, more points of attack.
Long answer:
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Lower endospore load than rye or wheat = less prone to contamination when prepped right.
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Smaller grain size = way more inoculation points in the same volume, so your mycelium can storm through the bag and your bulk substrate like a swarm.
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Nutrient-dense = once it takes off, it really takes off, pushing rapid, even mycelial expansion.
Bottom line: millet gives you a denser, more even colonization and a better shot at full, healthy canopies—exactly what Bruise Blue bags are built for.
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Home of the SHIITBAG
Meet the SHIITBAG—the loud, proud bulk substrate that doesn’t apologize for doing exactly what you want: clean, consistent performance at a price that doesn’t make you wince. It’s a rich, field-tested blend dialed for aggressive colonization and dense, even flushes—sterilized in-bag, sealed, and ready to rock. No drama. No mystery. Just a ruthlessly reliable bed for your mycelium to tear through. Contains horse shit. Starts at $9.99