I live in Boulder, Colorado, and noticed that a large rose bush (about four
feet tall) in our backyard is greening up already.

Last year, I vowed to prune it, as it is so tall that it bends down to the
ground once it blooms.

Should I prune this spring or wait until this fall?

I'm a rose/flower newby, as most of my gardening to date has been tomatoes,
cucumbers, and the like!

Any advice would be appreciated!

cheers,
Stephen