Got a strange problem with some D. rotundifolia I'm growing from Brasstown Bald (Towns/Union counties, Georgia). One of only 2-3 reported locations for this plant in my state, not currently in cultivation, and I'd hate to lose 'em. Two years old, just flowered and are hopefully setting seed. The funny thing is that the leaves appear to be dying back. It appears that the crowns are healthy, but when I get a minute I'll dig around further. They're outside, and since the heat here is basically roasting all of our body fluids out, I'd like to know if a heat dormancy might be normal for this plant at such a southern location. I'm 1 hardiness zone south from Brasstown Bald.
I honestly can't remember if they exhibited this behavior last summer. My thinking is--possibly--that since mountain species like S. oreophila have a hot/dry summer dormant period, other CPs from similar habitats might follow suit. Has anyone noticed this before in this species?
So.... normal, possible, or ludicrous?