Nice idea! Which kind of sub are you using? How much perlite do you add?
Thanks mahps. I'm sorry, not sure what you mean by "sub." For the perlite, this particular mix is 1 part ProMix HP, 1 part earthworm castings, 1 part perlite. We'll see how it goes, but I've been using this mix for a bit, and it stays soggier than I prefer. Gonna tone down the ewc...