I have two potted dahlias that are losing leaves. I left them outside after hardening them off for about a week. In the next few days they endured ~40 degree temps and 30 mph winds. Is this stress as a result of that or something else? The dahlias I kept in for a few more days and planted in the ground aren't showing these symptoms.
BTW, the damaged dahlias are still putting out new growth, but at the same time, I'm still losing leaves, either from rotting away, or at the joint between leaf and stem.
What to do????