That roses do best to cut back to the first set of 5 leaves on each bloom after it dies. You lose the rosehips that way if you are into using them, but it is supposed to make it bushier and have more blooms.

But do the heavy trim to 12"-18" long in early spring before they start blooming. I worked in a nursery and was told this by the man who ran it. My husband also worked in one and was told the same thing by that owner. I always tried to follow it. Can't fault it so far. My MIL always followed this, too, and had the most beautiful rose garden. I have only ever had a few compared to her. She had dozens and dozens.