I love them, too! Self-seeding in my area, not so much... for the last 4 years or so I've bought seed and tried to get some started, with no success (I regularly grow all sorts of stuff from seed, from petunias to tomatoes to herbs). Tried soaking the seeds, nicking the seeds, planting directly in the ground -- nothing!! Is there some trick to this plant that I should know (kind of sounds like everyone else is more worried about it being invasive than getting it to grow in the first place), or am I just getting bad seed?? I've never seen 4 o'clocks offered at the local greenhouses... any help is welcome and appreciated!