The Walden Effect: Farming, simple living, permaculture, and invention.

Low tech oyster grain spawn

Pressure cannerHere's the right way to start oyster mushrooms from scratch:

Stem butts in grainMaybe it's just me, but that procedure sounds pretty intense and far beyond the average backyard mushroom-grower's reach --- and I didn't even mention the part where you use the grain spawn to inoculate the fruiting medium!  Extreme measures are needed to keep one strain of mushroom pure for a big mushroom company, but what if you just want to expand your existing mushroom log collection slightly?

Last year, I experimented with growing oyster mushroom spawn on cardboard.  The jury's still out on whether that worked --- the trouble with mushroom experiments is that you often have to wait years before you find out if you were successful.  So I decided to experiment with a medium-tech way of growing oyster mushroom spawn in case the low-tech cardboard method doesn't pan out.

The vigor of oyster mushrooms (and the fact that I'm not planning on expanding my spawn more than once) allows me to ignore some of the sterility precautions.  Rather than jumping through all of the hoops outlined above, I simply soaked some leftover wheat Mushroom spawn areaovernight in open quart jars.  Next, I cooked the jars in the pressure canner at 15 PSI for an hour.  Once the grain had cooled, I spooned some into a couple of ziploc bags, leaving the jars halfway full.  Then I mixed in a bunch of oyster mushroom stem butts I'd collected off our bountifully fruiting mushroom totems this week.  I left the tops of the bags and jars open, but draped a damp cloth over them in hopes of keeping the contents moist.

I'm sure plenty of "weed fungi" got into the grain in my completely unsterile work area, but I suspect the oysters will outcompete those weeds pretty quickly.  As long as the spawn that appears is white, doesn't look greasy, and smells right, I'll assume my technique worked.  Then I'll be faced with an even bigger dilemma --- what to do with two gallons of oyster mushroom spawn when it's too late in the year for outside inoculation!

Our chicken waterer gives your flock something to peck at during long winter days so they don't peck at each other.


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About us: Anna Hess and Mark Hamilton spent over a decade living self-sufficiently in the mountains of Virginia before moving north to start over from scratch in the foothills of Ohio. They've experimented with permaculture, no-till gardening, trailersteading, home-based microbusinesses and much more, writing about their adventures in both blogs and books.



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Comment by Nilesh Bhuva Sun Nov 11 04:16:24 2012
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