Re: [EXT]Re: [Biochar] Mushroom update

Robert Masson

Good morning all,

I have two questions for the biochar community:

I’m writing an extension publication on Biochar for University of Arizona. We are testing many different things from treating fusarium wilt to water retention.

One limiting factor is pH, as our soils are alkaline 7.5-8.2 pH.

  1. Are there any techniques to make lower pH biochar?
  2. Does the pH stay after “priming” or does it go away?


Robert Masson

Assistant Agricultural Agent

Yuma County Cooperative Extension



From: <> On Behalf Of mikethewormguy via
Sent: Sunday, September 19, 2021 12:49 PM
Subject: [EXT]Re: [Biochar] Mushroom update


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On Sun, Sep 19, 2021 at 11:30 AM, Jim Bartlett wrote:

Looks good Mike, how do you do your cold sterilization. 



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On Sep 19, 2021, at 7:27 AM, mikethewormguy via <mikethewormguy@...> wrote:

When we set up the mushroom mounds we also did a wood ash

cold sterilized straw/wood chip bed in a plastic tote.


We got home from a trip yesterday and the King Stropharia mushrooms were fruiting.


I did experiment with adding a diluted PA blend as a substrate soaking mid-season.


Was not sure how the mushrooms would produce in a plastic container.




Sent from my Verizon, Samsung Galaxy smartphone




I use a 10% hardwood ash solution to soak the biomass for 24 hours.


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