I've never tried pulsatilla, but I have grown other seeds in vermiculite. I like the method. I just treated them as if they were in potting mix, and grew them under my t5 lights. I pricked them out as I would if they were in potting mix, probably around 2 or 3 true leaf stage. Here's an old thread on it:
The thread "Sowing in vermiculite" in
Seeds forum
I just (a couple of days ago) sowed a few tomato seeds in big cups covered in plastic wrap, wintersowing style. Force of habit, I guess. Had I given it any thought, I might have used plain vermiculite. Having been in Florida for a good while, these were the first and only seeds I've sown this year.
Karen
