What do you think -- will Enziandom survive (and occasionally, at least) bloom in my zone? My site is z 6, probably the lower end in this particular part of my yard, and fairly shady. I'm around 10 miles from the coast, so I don't think I benefit from any true coastal warming, although we get less of the surprise frosts than neighbors 5 miles further inland. We do, however, have great temp fluctuations occasionally, particularly in spring (where a high of 90 one day and a low near 30 in the next day or two is not unheard of).
How about Blue Billows?