Mushroom Grow Log 2

#myco, #bio🛠️

Stepping backward in the life cycle

For my next round of home mushroom cultivation, I moved up the fungus cultivation ladder and tried growing some grain spawn.

Diagram of the stages of mushroom cultivation from Paul Stamets
Illustration by Paul Stamets (click to enlarge).

In my first round, I did "inoculation of bulk substrate," the bottom third of Papa Stamets' diagram. This time, I'll start at "inoculation of grain," in the middle. I still lack the lab materials to propagate the pure culture (at the very top of the lifecycle), but I'm getting there.

PB to the rescue

Still working off my quarantine weight gain, in the winter I told my partner I was embarassed to be eating so much of this delicious, calorie-rich peanut butter. Good millennials that we are, the jars are always cleaned and stored, so the mounting evidence of my gluttony was inescapable.

But the gods have smiled upon my snack hungry self, because I've found the perfect use for the Smucker's Natural jars and they've entered into a full service mycelial ecosystem.

As far as source, I mainly followed FreshCap's video on making your own spawn, seen below.

After purchasing some high temperature silicone (mainly used to repair gaskets in cars), as well as some store-bought cotton balls, I drilled the self-healing injection port and air exchange. Then the grain was cooked and each of my three jars was injected with 3cc's of Pearl St. Oyster liquid culture from The Humble Fungus. All of this is documented in the bespoke, home-made slider component seen below.

One cotton ball for air exchange, one dab of silicone for a self-healing injection port.
One cotton ball for air exchange, one dab of silicone for a self-healing injection port.

Progress Log

Day 10

Here you can see from the 23rd of July, small but unmistakable signs of mycelium oyster action, 10 days in. This one is going wild.

Day 20

Definitely taking over the whole jar now. I'm realizing it's very important to leave enough space to shake the grain in the jar now, as the other jars are more packed and aren't spreading as fast. Hopefully in ten more days this one will be ready to start dumping in bags.

worker laying bricks

Workin' on it!

This post is still in the shop.