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EACH 5 lb bag of Grain Spawn is guaranteed to be viable and free from contaminations or we will replace charge.  Ready to transfer to bulk substrate shortly after it's arrival or keep refrigerated (36F or above) for several weeks or more until you are ready to use it.

Live Master Grain Spawn

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Strain : A - C

Strain : E - L

Strain : M - R

Strain : S - Z

Note: Live Master Grain Spawn are susceptible to extreme temperatures.  Please allow longer delivery then normal if temperatures exceed 90f or lower then 36f.  All Master Grain Spawn will be shipped on Mondays between these temperature conditions.  Allow 2-4 weeks for delivery (depending on strain)