Just a heads up, this tek originated from another member from this site years ago, although I cannot recall who,
over the years I have adapted it to fit my own needs and situations and found it to be easier and more effective my way.
I believe this tek will work for just about any grain with proper adjustment to cook times. So lets get started.
Grain of Choice(In this case Whole Grain Corn Bird Seed and Traditional Bird Seed.)(Popcorn works great too.)
Long Handled Stir Spoon
Drainage Bag(Paint strainer, or Mesh Laundry Bag)
Jars of choice
Filters for jars(Micropore tape, tyvek, polyfil)
Start by adding your grain(dry) to the bottom of your pressure cooker(also dry)
Cover grain with several inches of water, the more the better.
Turn on heat to high.
Once steam is pouring out of vent add rocker weight to vent on PC.
Pressure cooker WBS at 10psi for about 30 mins, Popcorn/Kernel Corn/Rye for 45min at 15psi.
Once time is up, allow pressure to drop and then carefully remove lid facing way from your face.
Pour water out into colander, careful not to overflow with your grain.
Now get your bathtub or sink water as HOT as it will go and add it to your grain in PC. Once grain is covered
by several inches of water stir well with your long handled spoon. Drain water again and repeat filling with hot water,
stir and strain multiple times until the water comes out clear or almost clear. It's important to use HOT water as otherwise
the starch from the grain will congeal and cause problems in the future with colonization.
After your grain water is coming out clear and the grain doesn't feel slimy to the touch it is time to add the mix to a mesh bag,
I would recommend a mesh laundry bag as they are more durable than paint strainers.
Now hang your grain-filled mesh bag up somewhere to air dry, if you have your own backyard you can hang it from a tree as the
wind will speed up this process but hanging it from your curtain rob in your tub works just fine as well..
After sitting overnight the grain should feel mostly dry to the touch and might even start sticking to other pieces of grain.
Now you can carefully pour the grain from the netbag into large bowls and start filling your jars about 3/4 full.
I recommended punching 2 holes in your jar lids and covering each hole with micropore tape and then covering the lids with aluminum foil.
Put old jar bands in the bottom of your pc or a rack or a folded up towel to keep the jars from touching the bottom of the P.C. during cooking.
Don't worry if a little bit of water is touching the jars.
Add the lid to the P.C. and put your burner on high. Once steam is pouring out the tops of the jars, add your rocker weight.
Keep the heat on high until your PC gauge hits 15p.s.i. and then turn the heat down to your sweet spot to keep it at 15psi. (Usually between medium and low.)
Pressure cook the jars at 15p.s.i. for 60-90 minutes and when the timer beeps turn off the heat to the stove.
Let the pressure dissipate slowly, don't rush it. Once the safety pin drops you can remove the rocker weight and let the P.C. cool for about 30 mins before
opening the lid, once again careful to open it away from your face as the steam inside can scald you.
Using oven mits carefully remove the jars one by one and tighten the lids before shaking the jars to evenly spread the moisture in the jars throughout evenly.
After all have been shaken and lids tightened return them all to the pressure cooker and allow the jars to cool overnight, leave the foil ontop of the lids to cover
the filter holes.
When you're ready for inoculation burn the tip of the needle until it is red hot and then cool with a paper towel soaked in alcohol.
One by one remove the foil from the jar lids and wipe the tape covered holes with alcohol and then the needle before injecting 5-10 units of spore solution to each jar, immediately cover the holes with a second layer of micropore tape(I like to have a piece already started next to the hole so as I am removing the needle I can immediately cover the hole as i'm pulling the needle out.)
Systematically repeat this process until all jars are inoculated and then write the strain name on the micropore tape on each jar lid.
I have had nearly 100% success with this technique the most important things are that your spore solution is not contaminated, your grain is not too wet and that you have allowed your prepared spawn to air dry properly before adding to jars, the shaking after pressure cooking is important too as alot of water likes to come out of the grain during PC'ing.
My favorite grain mix at the moment is 80% Whole Kernel Corn(Not Popcorn), and 20% WBS(Red Milot, Millet, Sunflower Seeds) the Corn colonizes super fast whole the WBS fills the gaps in the large kernels making more mycelium spawn then just pure corn would.
Please feel free to ask any question you may have!