Cracks and splits in rose leaves
I have looked on various websites and can't find anything resembling what one of my roses is experiencing. The leaves start out fine, but then dry out, develop cracks and splits and eventually crumble. The developing buds look fine and there is no sign of any pests. I don't think it's caused by under or over-watering either. Any suggestions welcome! this is just my second year with roses, so I am a novice!