Thank you sooby and drdawg. I am in Zone 6b. This is the first summer they have fallen over. I have another cluster on the other side of the bed that are still standing straight. I read somewhere that it was the result of too much fertilizer and the soil is rich enough without it. Is there any truth to that? It seems like if that was the case, both clusters would have fallen. I've decided to cut them back and see what happens. I'm new at this, so thank you very much for your help.
