The only time I ever got any to germinate was when I set them outside in a cool, shaded spot. They didn't like the warmth of the GH. Unfortunately, I let them dry out, so I never got any mature plants. Mine came from Parks, too. But according to Tom Clothier's site, the seeds want 65 to 75 deg. to germinate. I think I still have some. Maybe I'll try them again, but in a somewhat cooler spot in the GH.