Too much nitrogen causes a surplus of green growth and a lack of blooms; nitrogen comes mostly from manure and grass clippings. I expect it's possible to feed a rose too much nitrogen, if your compost was entirely grass clippings or some such, but if it's any reasonable mixture it should be okay.

--Chris

Nope. Modern roses are programmed to bloom on new growth. Any new growth will result in blooms. "Blind shoots" are the result of rootstock suckers or in shoots from the scion forming during wierd spring weather.

My word, I never would have thought of that!
Thank you both for taking the time to help me
Maggie