Forgot about the vermiculite. I think it would work great for faster growing things, like annual zinnias or petunia. They'd grow faster than my echinacea or begonias that I'm currently trying, and graduate to potting up in soil.
The other thing I'm thinking: I've always used a light sprinkle of vermiculite on top of seeds I'm trying to germinate. I think I should use more, a little thicker layer. Seeds might germinate better, faster, and roots could grow through and down to soil. I think in the past I've skimped too much on the vermiculite.
Karen
