knockout rose problem?
I don't know if this is a problem or not. I have a double knockout rose that I planted 10/06. Last year it looked terrific. This spring it's leafed out great, but now a bunch of the leaves are dried up and falling off. I live by Binghamton and last week we had a wicked frost. I'm wondering if its frost die back. I also have a climbing rose that's OK. I've fertilized the knockout and watered quite a bit. Any advice?
Also, has anyone heard that the organization who rates our zones have changed the zone designations? Supposedly my zone is now 6.