if you look furthur down the page, I started a post on your very question

Carla

Here it is...

Here is a link that might be useful: thread on 10-10-10

Whatever fertilizer you apply to roses, should be done immediately after pruning. Of course, you can apply after that, but that is the general consensus among rosegrowers in my area. Yes, you can apply 10-10-10 to any established plant but not large quantities, broadcast it, not apply it.