In addition to the harsh winter-related problems I've had recently, I've also experienced poor new cane quality in the last year or so. I used to get husky new growth, but last year's (might have been the nasty heat wave we had) was very spindly. Which ultimately made my roses more vulnerable to winter damage.

Is there a number in the N-P-K range that I should be looking for? Is there a recommended fertilizer? I used Rosetone a few years ago and it was all right I guess, but not all that impressive.