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North Spore Shop: Bulk Substrate, North Spore Mushroom Grow Kits & Cultivation Supplies

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Offlineashpratt
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Am I using a 75% spawn rate?!?!
    #21819232 - 06/17/15 02:10 PM (8 years, 7 months ago)

For about 40lb of dry straw (which makes about 200lb of wet substrate), I am using 30lb of spawn. I always calculated spawn rate by wet substrate rate, which would give me around 15% but if it's dry substrate then that would be a 75%.....


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InvisibleRogerSmith

Registered: 01/29/15 Happy 9th Shroomiversary!
Posts: 365
Re: Am I using a 75% spawn rate?!?! [Re: ashpratt]
    #21819664 - 06/17/15 04:28 PM (8 years, 7 months ago)

Ratio is for wet substrate. You are doing it right! Some people get away with 5% ratio too. So you could try lowering it a bit


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OfflineGr0wer
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Re: Am I using a 75% spawn rate?!?! [Re: RogerSmith]
    #21820030 - 06/17/15 06:02 PM (8 years, 7 months ago)

I do it by volume, 5 gal pail 1 gal spawn 4:1 ratio. Never bothered weighing my pails.... Im sure its close enough to weight ratio calculations.


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Offlinedrake89
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Re: Am I using a 75% spawn rate?!?! [Re: Gr0wer]
    #21820417 - 06/17/15 07:32 PM (8 years, 7 months ago)

If you go by the European way, look at mycelia.be, the weights are both wet.  The stamets American way is wet spawn to dry sub, so yeah.  You are using 75% spawn rate.


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Offlinebeastcoast
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Re: Am I using a 75% spawn rate?!?! [Re: drake89]
    #21820835 - 06/17/15 08:57 PM (8 years, 7 months ago)

I'm new to this. How does 40 pounds of dry straw become 200 pounds of wet substrate? I thought straw was the substrate? Surely it does not absorb 160 pounds of water.


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Offlineashpratt
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Re: Am I using a 75% spawn rate?!?! [Re: beastcoast]
    #21821021 - 06/17/15 09:44 PM (8 years, 7 months ago)

If you take 40lb of straw that is close to 0% water and make it 80% moisture (4/5 water content) then it comes out to about 200lb.

That wasn't a very intelligent sounding way of explaining it but you get the idea. Straw is substrate and substrate is straw. I just called it substrate when it's wet because it has been pasteurized and is thus ready to be used for substrate.


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North Spore Shop: Bulk Substrate, North Spore Mushroom Grow Kits & Cultivation Supplies


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