Blind shoots on Ispahan rose
I have an Ispahan rose which was beautiful for several years then started to develop long blind shoots which didn't appear to be suckers so I just pruned out. Last year it was so big I had to cut it back really hard - down to 2 feet or so. This year it's produced loads of blind shoots which would overwhelm the flowering shoots so I've had to cut them down. I've obviously done something wrong. Any thoughts or advice would be welcome.