i will be pruning a rose this weekend coming (sat 8th march). i have read that when cutting stems, to prevent borers you need to seal the cuts - i have read that for this you can use wood glue - just wanted clarification that this is correct? i havent seen any pics of how much glue you put on as an example. do you leave a smooth blob of it? or?
also while on the subject. when cutting old stems flush down to the bud union/ground level, do you need to seal those aswell?