British Columbia, Canada
Problems with two of my David Austin roses. Last year some of the leaves gently curled under which were perfectly clear of symptoms. Other leaves yellowed etc. and fell off. Those which curled under had no marks whatsoever on them. I have five new Austin roses and I don't want them to do the same.
I am afraid to spray in case I kill them. Also I encourage beneficial insects and have frogs and salamanders here.
I hope someone can help.
- 1 May, 2012