How do I stop canes from turning black?
Lots of the canes on my old and new roses keep getting black. I cut off down to green but still keep getting black canes. Do I need to seal the cut to keep it from going black? They don't all do it but a bunch have done it the last month or so. Its so irritating because on a couple of them I have had to cut a bunch of canes off. On most of my new ones (which I kept in my unheated garage but would open the doors to let the sun in) I specifically waited until they started leafing out until I put them in the ground. On my older roses it seemed to start happening after I pruned them. Could it have been the cold spells we had this spring? Sorry to go on and on but I am getting frustrated. Thanks for any help, Judy