Hello Natalie and welcome to roses!

Although it is colder where you are, I believe you may at least be similar to me. If your plants shut down and go dormant during winter I wouldn't fertilize. If you fertilize now and it gets too cold, that could definitely cause problems (dieback). What are your winters like?

Dry fertilizer only works if watered so it is released to the soil. If the plants don't get a lot of water (something I'm guilty of in winter) it is at the very least a waste of money.

In my zone, it is recommended to fertilize with liquid fertilizer through the winter because the plants never go fully dormant, in fact if I don't fertilize in winter, my flowers will be far fewer in spring. Also need this method because there is less rain and I tend to water less winter. We avoid fertilizing in July and August, which are our harshest months. Fertilizer, overall, is not good during temperature extremes, whether cold or hot. It is possible you are a more definite combination of hot and cold weather than where I live.

Organic fertilizers work when the soil is warm enough to break down the components. General rule is to stop fertilizing 6 weeks before first frost date, which for me (northeastern border of 7a) was October 15, so I stopped all fertilizing the beginning of September, and stopped applying organic fertilizers in early October. Keep that bag, and start applying again in the spring (late winter) after you have pruned.

Thank you both Diane and Aureliajulia!
I have several climbing roses that probably need some kind of support. Trellis maybe? They are five and a half feet tall. Will they do well without support, or trellis is a must?
Also, I don't know when and how to prune them. At this point they are tall thorny sticks. I do cut flowers off at the 5 leaves configuration when they are done blooming. That is probably the only thing I know about roses :).
So, in zone 7b (Atlanta), when and how do I cut down if nessesary these kind of roses?
Thanks!
~Natalie

By mistake I pruned my climbing roses bushes early in the spring (before they bloomed) and for the first time I got two blooming spells and it looks like there might be three. I don't understand. Phyllis - PS I live in Albuquerque, NM; Thanks

Phyllis Caponera, your questions would be best answered by starting a new thread in the Roses Forum, and including the variety name of the rose. Depending on how long the rose has been in the ground, it might just be mature enough for three bloom cycles. Sometimes, just, because.