I grow only the purple (magnus) and a white (white swan) variety. The white ones died back and were mia for several years and last year they seem to have reemerged in just a couple of spots.
The purple ones thrive here but I'd like to add at least 1 or 2 more colors but not sure just which ones will reseed or comeback the following year.
Any suggestions? I am in a zone 5/6.