1 bagGrain Spawn
5 lb bag · species selected at checkout
Complete grow bundle
Grain-to-Grain Expansion Bundle
Expand 5 lb of clean spawn into twelve receiving grain bags.
Everything in the box
Here's what you get
1 bag
12 bagsSterilized Millet Grain
2.5 lb each · agar and grain transfer port
Mushroom Growing Supplies Canada
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Grain-to-Grain Expansion Bundle
From$134.95
In Stock — Ready to Ship
1 × Grain Spawn 5 lb — your chosen strain paired with 12 × sterilized organic millet grain 2.5 lb bags with transfer ports (30 lb total).
25 strains available. Your selection will appear in the cart.
$148.95$134.95for 8th Wonder — Black Poplar (Pioppino)
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SKU: NL-BNDL-G2G
Category: Mushroom Growing Supplies Canada
Product Details
Expand clean, proven grain spawn into a larger spawn run without purchasing another culture.
What’s included
- 1 × Grain Spawn 5 lb — your chosen strain
- 12 × Sterilized Organic Millet Grain 2.5 lb bags with transfer ports (30 lb total)
Five pounds of colonized spawn expands into twelve receiving bags at approximately a 16.7% transfer rate. Grain-to-grain transfer requires a flow hood, still-air box, or similarly clean transfer environment. Fruiting substrate is intentionally not included.
The bundle price already includes the discount — no coupon needed.
Colonized spawn is produced fresh to order — please allow 14–21 days before shipping.
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Product description by Andrew Langevin · Founder, Nature Lion · Contributing author, Mushroomology (Brill, 2026)
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