Name: Dick Strever No.Calif amongst the Redwoods (Zone 9a)
i have pretty much ignored all the hostas in my garden all these years
and this year i have given them a little more attention
and will notice this photo period thing a little more
so some are more photo-period sensitive then others evidently
which makes more sense then temp sensitive/hardy
I'm really not much help. I usually quit paying attention to them early October. I don't cut mine back in the fall. I have noticed that the ones with thicker foliage do tend to last longer. I think placement helps too. Last week I noticed some behind a building that still looked pretty good. My gardens that are not protected from the winds and frost are done for the year.