There are many secrets to cultivating
mushrooms, but the technique that seems to be most employed if you want
to increase your yield is to use the glass jar method.
This involves using something like organic brown rice or brown flour,
staying away from anything with preservatives that will work against
mushroom growth. The trick is to keep the mixture sterile, with
about 1/4 cup of distilled water. Most people seem to think a pressure
cooker is needed at 15 pounds for an hour to guard against
contamination, once it's cool it acts as the perfect environment for
your spawn
to multiply in. It would be interesting to compare Anna's
wet cardboard method with the jar trick and see just how much more
you can expect for all that extra fuss.