Can anyone help with leaf problem??
2-3 weeks ago my rose plants all looked fresh and green, really nice. Now I'm seeing leaves turning brown and dying. See image. I use only Rose Tone and alfalfa pellets, no chemicals.
We did have several nights 7-12 days ago that got down to 38 degrees, and I didn't see a heavy frost but maybe there was a little. Could that have done this? I see this on at least one third of my roses. Many thanks, David