if your speaking of the vermiculite and corn pic...im am unsure of my method as well. i was under the impression that the mycelium would spread through the vermiculite??? and create a more even web of mycelium? or will it not gorw into the verm since verm has no nutritional value....?
if thats the case i will fruit tomorow and see what happens....should get something out of the deal right?? lol
live and learn...im trying to understand this stuff the best i can but i fear my understanding may be incorrect.
anyhoo, i still have 8 jars that are colonizing at rapid rates so i havent blown the entire operation as of yet...my biggest fear is contam on the straw. I checked my straw casing today and some of the mycelium has in fact reached its little fingers onto a few pieces of straw and seems to be doing what its supposed to. i think the straw is going to take a full week before its ready to fruit but when its ready i think ill be pleased with the results...and as you can see from the pic i definatly have enough straw to last a couple grows lol.
Growing through pure vermiculite is only providing the hyphae with moisture and a "direction" - it is seeking more nutrient and will grow many inches in order to find more.
What I fear here is that you didn't really case, that is if I can see corn. If that is the case, then what you have done is simply spawned into inert material. This will mean that the mushrooms you get from it will be taking all of their nutrient from the individual kernels of corn - this is not casing in the conventional case.
It looks to me as though you may as well attempt a pinning now but I don't know what the result will be.
Ordinarily what you should have done is propagate your mycelium by using the "seeds" of innoculated corn which have been placed or spaced in a nutritional substrate, the mycelium will grow from the corn into a mass that will finally conglomerate making one giant mass of mycelium, one single organism that feeds, grows, reenforces itself, repairs itself and finally, when it is threatened with extinction through no new prospects of more nutrient, a dip in the temperature or some other signal, it will bear fruit or attempt to replicate.
This is no different than pot. You grow your plant to a certain size and when YOU are ready, you signal the plant that it will soon die and it had better get busy reproducing by way of flower and hopefully, begin to bear fruit (seeds). Of course the larger and more powerful the plant the more seeds it will produce - of course you will inhibit the production of seeds in this case.
If you can understand how the mushroom works then you can manage it. A spore finds fertile surface - one that has nutrient and moisture and it quickly germinates. In this case, that is not enough, it needs a genetic exchange and is assured that it's effort will not be wasted when it encounters a second, sexualy complementary hyphae from another spore. In this case it creates a clamp connection and exchanges genetic information. It also gains renewed vigor and begins to exploit it's environment. Most times that environment is underground, in the dark. Most times there is little air exchange, when the now sexualy mature mycelial mass has encountered the limits of it's nutrient foundation it will begin to fill out it's niche, sending out more, shorter hyphae - just as a root structure does. Eventually it will run out of even those pockets. Now one of the reasons you see rhyzomorphic structures is that these can travel long distances with a minimal amount of energy looking for even more nutrient. At the extremities of it's search it encounters light and is triggered to fruit with the intent of erecting tiny towers and umbrellas which will contain more spores. These spores are actually blown out of the structure that hold them with huge force - the acceleration is hundreds of gravities. Those spores light on the wind and extend the range of the mushroom far beyond anything that it could do traveling along, within or on top of the ground in the form of mycelium. The cycle continues when two complementary spores light on yet another receptive growing surface.
So, casing - that is, a reduction in nutrient - light, that is a signal that the mushroom will not grow into the ground or benieth the soil and so be unable to expose those towers to the breeze, temperature, that is it will soon be vulnerable to freezing, and a reduction in CO2, another indicator that it is near the surface are your pinning triggers.
So long as you work with the life cycle of the mushroom in mind just as you have with pot - you will find success. This again, is why PF tek is so wrong. It depends on the mushroom finally depleating it's resources alone, and the mushroom, having used most of those resources simply to continue to exist has only a small reserve with which to use to create fruiting bodies.
You can actually see the results of what the mushroom will do if you put your grain packed into a container. After your first flush you will see your grain "plug", the mass in the container shrink, sometimes as much as an inch on all sides. this is a result of your mycelial mass having consumed the grain and rendered the entire mass with considerably less volume.