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Joined: Mar 2006
I planted my Blue Butterflies from seed a few years ago. They bloomed the first season from seed (although I did start them indoors, about 10 weeks before my last frost date), and not only have they been thriving, but I started seeing self-sown seedlings last year! They are an outstanding true blue, although I noticed some of the new seedlings were sporting slightly different shades (mostly paler blues). Jung's Seeds lists them as being hardy to Zone 3. I'm in central Zone 4 & have them about 6' out from a south facing wall. They usually get decent snow cover, and sometimes I actually remember to cover them with leaves from my maple tree in the Fall.
If you go to jungseed.com you can order both seeds and plants there, or you can request a catalog. I've both ordered from their catalog and gone to local (Wisconsin) Jung's stores. They've been in business for over 100 years, and are very nice folks!
The great thing about gardening is that you always get a chance to start over!