PASTEURIZED
CV Prime substrate
$34.995 lb
The original MushRealm ACS recipe, the exact blend ACS runs in every grow: coir and vermiculite, pasteurized and hydrated to field capacity. Mix in colonized spawn and fruit straight from the bag.
3LBSTERILIZED
Grain spawnMilo USA menu
Sterilized milo grain spawn
$15$5.00 per lb
Fully hydrated milo grain, pressure-sterilized and sealed in a 0.2 µm filter-patch bag with a self-healing injection port. Inoculate the moment it lands.
- Weight
- 3 lb
- Grain
- Milo (sorghum)
- Prep
- Fully hydrated, pressure-sterilized
- Bag
- 0.2 µm filter patch + self-healing port
- Works with
- Oyster, lion’s mane, shiitake and most gourmet species
- Spawns
- 6 lb of CV Prime at 1 : 2
1
Most orders leave in 1 to 2 business days. Ships from California. Shipping priced live for your address at checkout.
Complete the growCV Prime substrate · 5 lb · $34.99
One grain bag spawns one CV Prime bag at about 1 : 2, the same pairing as our kits.
The details
Fully hydrated milo grain, pressure-sterilized and sealed in a 0.2 µm filter-patch bag with a self-healing injection port. Inoculate the moment it lands.
- 3 lb sterilized milo grain
- 0.2 µm filter patch
- Self-healing injection port
How to use it
- Wipe the injection port with alcohol and inoculate through it with live mycelium of your chosen gourmet species.
- Let it colonize somewhere warm and dark. Shake once to spread it when about a third is white.
- When it is fully colonized, open it and mix it into CV Prime.
Your Grow Dashboard tracks every stage and reminds you when to air and mist.
Shipping and the guarantee
Ships to US addresses only, usually UPS Ground, priced live at checkout. If a bag shows up contaminated or damaged in transit, send a photo within 7 days of delivery and we replace or refund it. Shipping policy · Returns and refunds.
Storage
Cool and dark. Use grain spawn promptly for the best results; substrate keeps for several weeks sealed. Do not freeze.
Intended use
A horticultural supply for growing gourmet mushrooms. This product contains no mushroom spores or cultures and is not for human or animal consumption. Read our intended use statement.
What you get
Sterilized milo (sorghum) grain, fully hydrated and pressure-sterilized in a bag with a 0.2 micron filter patch and a self-healing injection port. It arrives ready to inoculate, so there is no soaking, simmering, bagging or pressure cooking to do. Pick a 3 lb bag for a single grow or a 5 lb bag to spawn bigger batches.
Included and not included
| Included | Not included |
|---|---|
| 3 lb or 5 lb of hydrated, pressure-sterilized milo | Live mycelium of your chosen species (you add it) |
| A 0.2 micron filter patch so the bag can breathe | A pressure cooker (you will not need one) |
| A self-healing injection port | Bulk substrate: CV Prime is sold on its own or in the kit |
Why milo
Milo is a small, round, hard grain. Every kernel is an inoculation point, and a 3 lb bag holds a huge number of them, so mycelium jumps from grain to grain quickly and spreads evenly when you mix it into bulk substrate. Its tough hull resists bursting during sterilization, which keeps the bag loose and easy to break up. More on the choice in oats vs milo grain spawn.
Which gourmet mushrooms it suits
| Species | Spawn it into | Notes |
|---|---|---|
| Oyster (blue, pearl, pink, golden) | CV Prime or straw | The easiest place to start |
| King oyster | Supplemented hardwood sawdust | Likes a cooler fruiting room |
| Lion's mane | Supplemented hardwood sawdust | Harvest before the spines yellow |
| Shiitake | Hardwood sawdust blocks or logs | A longer run, worth the wait |
| Wine cap | Wood chip beds outdoors | A garden bed favorite |
How to use it
- Wipe the injection port with 70% alcohol and work somewhere clean and still.
- Inoculate through the self-healing port with live mycelium of your chosen gourmet species: a colonized grain transfer, a commercial grain spawn of that species, or a liquid inoculant.
- Keep the bag at 21 to 24°C (70 to 75°F), out of direct sun.
- When about a third of the grain is white, break it up and shake to spread the mycelium.
- Once fully colonized, typically 2 to 4 weeks depending on species and temperature, mix it into CV Prime at about 1 : 2 or into the bulk substrate your species prefers.
Step-by-step help: how to inoculate grain spawn bags, how long grain spawn takes and the spawn to bulk guide. The spawn to bulk calculator works out how many bags you need.
Storage
Keep unopened bags somewhere cool and dark and use them promptly: sterile grain is at its best soon after it arrives. Do not freeze.
Shipping and the guarantee
Ships from California in 1 to 2 business days, usually UPS Ground, with live rates shown at checkout. If a bag arrives contaminated or damaged, send us a photo within 7 days of delivery and we replace or refund it. See shipping and returns.
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Complete the grow
See the whole menu Pairs well with
MATCHED PAIR
Grow kit bundle
$44.99Single kit
One 3 lb grain spawn bag and one 5 lb CV Prime bag, matched for a single grow. No autoclave, no guesswork.