I received two monkshoods as a gift several years ago, a bicolour one and a purple one. Though growing side by side on the west side of our home, they have never bloomed at the same time. In fact, the purple one blooms so late that if I don't cut the budding stalks before the frost in early to mid-September and put them in water inside, I miss seeing them bloom altogether. Oddly, I have purple monkshoods in another location, which is more shady and damp, but they bloom much earlier than this one. Last fall, we had several inches of snow, then a big melt which left my flowerbed bare, followed by severe cold. Now the bicolour is growing fine, but the purple one is more delayed than ever, as you can see in the photo - bicolour on the left, purple on the right. I am wondering if the purple one was damaged by the cold, or if there might be some other problem, and what I can do to encourage its growth. I would greatly appreciate any helpful ideas you can offer.