In reading the post (Will removing larger mushrooms earlier.... ) i thot of something. When growing plants, a lot of times the water you add to the plants can lack setting micro nutrients that are not included in the fertilizers.
Now here is the question. If you were to add micro nutrients (found in most garden sections) to the vermiculite particles with a layer of BRF, could this infuse into the cakes and create a higher nutrient value , which in return create a higher yield.
I have wondered that as well. I hope someone who knows more answers.
My guess would be no, not with the pf-tek