BrownBear's Corncob Tek - Mushroom Cultivation

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BrownBear
Warrior-Traveler

Registered: 06/06/20
Posts: 1,539
Last seen: 7 months, 21 days

BrownBear's Corncob Tek

9
#27336817 - 06/06/21 07:02 AM (1 year, 7 months ago)

Corncob is my go to substrate. I typically use a 60% corncob/40% coir mixture. It has given me great results.

For the 60% corncob/40% coir substrate I use 1 small brick of coir, 2 full quarts of corncob pellets and 7 qts of water. This recipe makes 18 qts of substrate.

No one in mush cult seems to be familiar with corncob as a viable substrate. With this tek I would like to prove that corncob can be used as a stand alone bulk substrate and not just a additive or a substitution for verm or something.

Paul Stamets wrote about it in one of his books. Here is a short exerpt from the book.

Fortunately for me and hopefully others who give it a try, it now comes in a shredded and pelletized form. This makes prep super easy. For some, the one downside is that it must be heat treated. I used warm tap water to hydrate it the first time I used it. Ran a test in a container of just hydrated pellets and I ended up with cobweb mold a week later. I like hydrating the corncob and coir with boiling water anyway. I have used corncob based substrate that was prepared with boiling water and after a week of sitting before using it, it colonized and fruited with no problems.

A 40# bag is like $9.95 at tractor supply. Each 40# bag will expand to 140 qts of hydrated substrate.

For this tek, I am going to use 100% corncob pellets and water. That's it. I am also going to run 2x 64 qt tubs. Full size monotubs aren't really my thing but since a majority of folk around here use full size monotubs, I am going to use them for this particular tek.

I use a 24 qt stock pot to hydrate my substrate. This recipe makes 30 qts of substrate. You maybe wondering how you can fit 30 qts of substrate in a 24 qt pot. Even though the pellets hydrate and expand, it still stays well compact inside the pot. When you remove the corncob from the pot and fluff it before using, it will expand the rest of the way.

6 quarts corncob pellets
9 quarts of tap water

I pre measure my pellets. Bring water to a rolling boil. Turn off burner. Add the pellets. Put lid on. Take the pot off the burner. Let it sit until its cool enough to handle without being burned. This typically takes around 6 hours.

This is what it looks like when hydrated to field capacity.

https://giphy.com/gifs/ZU7vTBsIocyZk3ZZYN

Each 64 qt monotub will receive 10 qts of corncob substrate, 4.5 qts of ESS wheat spawn and just enough corncob to cover the top.

5 days after spawning

I began to see contamination on day 6.

I will continue to seek the limitations of this substrate. Through this thread, we will continue to discover all of its uses within this hobby. Thank you to all who have participated and will continue to participate.

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Edited by BrownBear (06/14/21 12:10 AM)

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