Have you done slurry tests Weasel? A lot of the MC issues I've come across end up with the pH of the medium out of whack.
Also, don't oyster shells have to be broken down by the microbes in soil during cooking in order to be available to the plant? I'm no organic grower but that's what I thought.
Also, don't oyster shells have to be broken down by the microbes in soil during cooking in order to be available to the plant? I'm no organic grower but that's what I thought.