Are you keeping them all in the same area? I'm looking at your D. Schizandra and she seems to be loving life.
The last batch of photos were all from the same grow area. I have several so not all of my plants are in the same place. Strangely, I have another schizandra out in my garage space facing temps in the high 30's F. this week and it's doing o.k. as well, tho' it's not exactly thriving. When it warms up some it will likely take off again.