Maybe I've just been lucky but my wintersown petunias have always been no-fail. I don't do all that messing with home made soils like Rick- just plain old ProMix or Fafard or whatever professional mix I get that year. Petunias are the one I just assume will always do well.
Laura Bush did
too well. It reseeded with such a vengeance I had to stop growing it.
Karen