My omeiense overwinters in Zone 7, and balsamina and capensis self-seed each season. What other impatiens species will either be perennial in Zone 7 or self-seed?
Here is a list of Impatiens that may be hardy for you there. The ones marked with a P are prennial and A are annuals. The ones marked with a ? are of course questionable in hardiness. I have all but 4 of these.
3. ARGUTA ALBA-P
4. ARGUTA UPRIGHT-P
Thanks, Derrick, I'll save list. Do you know where I might find seeds or plants of tinctoria?