When should you start pruning roses for the winter? Also I have roses in pots. Can I put them in my garage for winter?
Please include your location and the types of roses in question. Unfortunately, that info is vital for a helpful response. Here is the GKH webpage on winter prep. https://www.gardeningknowhow.com/ornamental/flowers/roses/roses-winter-care.htm
Usually around November when they are dormant, although we did ours last week which was a bit naughty. I have pruned them early before and they've been ok.
The roses in the pots can stay in the garden perhaps somewhere a bit sheltered like near the house temporarily. Mine have always been fine in the pots left out. Just check they don't need a bit of water winter time if its been very dry but not if you hear it's going to be freezing.
Don't prune until the plant is dormant. Pruning now tells the plant to put out new growth which will not have time to prepare for winter. New growth dies and the plant is weaker for having sent up new growth when it needs to store energy for winter.
Ultimately, the answer to your question depends on what type of rose you have, rugosa shrub, hybrid tea, climber, etc. Read this: https://www.gardeningknowhow.com/ornamental/flowers/roses/roses-winter-care.htm
If you still have questions, go here: http://www.jacksonandperkins.com/jp-winter-care-advice/a/516/