I also live in the SF Bay area. What I do with my repeat blooming roses is prune them (only if needed for shape) in January (my rose gardener friend says "after the Rose Bowl and before the Super Bowl"), and I feed them then with some sort of time release food like Osmocote. (Once blooming roses I prune & feed in the summer, after they have finished blooming). Then I put 2-3" of mulch or compost down around them (not touching the main canes) ON TOP of the fertilizer. In our mild (right now WARM!) climate, I think that gives them a good start on their Spring growth. Of course, in our climate Spring starts in Feb, so this may shock folks in cold winter areas, but it works here for me.

Other issues of course are light and summer water - are they getting enough of these?

Jackie