2 bagsGrain Spawn
5 lb bag · species selected at checkout
Complete grow bundle
Commercial Grain-to-Grain Expansion
Expand 10 lb of clean spawn into twenty-four receiving grain bags.
Everything in the box
Here's what you get
2 bags
24 bagsSterilized Millet Grain
2.5 lb each · agar and grain transfer port
Mushroom Growing Supplies Canada
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Commercial Grain-to-Grain Expansion Bundle
From$242.95
In Stock — Ready to Ship
2 × Grain Spawn 5 lb — your chosen strain (10 lb total) paired with 24 × sterilized organic millet grain 2.5 lb bags with transfer ports (60 lb total).
25 strains available. Your selection will appear in the cart.
$268.95$242.95for 8th Wonder — Black Poplar (Pioppino)
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Nature Lion is based in Brantford, Ontario
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SKU: NL-BNDL-G2G-COMMERCIAL
Category: Mushroom Growing Supplies Canada
Product Details
Expand clean, proven grain spawn into a larger spawn run without purchasing another culture.
What’s included
- 2 × Grain Spawn 5 lb — your chosen strain (10 lb total)
- 24 × Sterilized Organic Millet Grain 2.5 lb bags with transfer ports (60 lb total)
Ten pounds of colonized spawn expands into twenty-four 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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