HI,
I have a beautiful "Black and Blue" that I would really like to keep growing for next year. The claim is it is zone8-10 but I'm in 7b. Many, including the nursery I bought it from claim it will do fine in zone 7 and possibly 6 if mulched very well.
I thought about collecting seeds as a backup and came across this article from the attached URL in which the author lifts them over winter, essentially treating them like Dahlias. I was wondering if anyone has tried this and how successful they were. I know this variety is easily found locally and not that expensive, but I would still like to treat it as a perennial rather than an annual. So far we've gotten a few freezes down to the upper 20s and it is still blooming; being close to the house & in a raised bed may be protecting it thus far.
http://blog.arrowheadalpines.c...
