Liz, I feel your pain about the frost damage, and I live in zone 7a/7b. This is the 1st year I had so many plants affected. I initially thought it was botrytis, but it wasn't. I also had to trim many of my plants due to the damage
I will be following this thread closely to see what happens with your plants next year. I'm sorry to see that you had so much damage this spring.