How should I prepare my climbing roses for the fall/winter dormant season in a non-snowy climate?Updated a month ago

In mild climates like mine here on the farm in Zone 9b, where roses don't go fully dormant, preparing climbing roses for winter is about protecting them from the occasional freezing weather while encouraging healthy growth for spring. 

There really isn't much additional prep you need to do for a climber that would be different that how you would prep any of your shrub type roses for the winter weather. I don't do any additional prep for my climbing roses here at the farm.

Gradually reduce watering as temperatures drop, but don't let the soil dry out completely. You may need to water occasionally during dry winter spells.

Avoid fertilizing in late fall, as this encourages tender new growth that may be more susceptible to cold snaps. Stop fertilizing at least 6–8 weeks before your first expected frost, if any.

Apply a thick layer (2-3 inches) of mulch around the base of the plants to insulate roots against fluctuating temperatures. Organic mulches like compost or shredded wood chips work well.

For young climbers, avoid heavy pruning in fall. Instead, focus on removing any damaged or diseased canes. Wait until late winter or early spring to do any shaping or major pruning, which can stimulate fresh growth at the right time.

If you get occasional frosty nights, you can wrap the lower parts of the canes in burlap, frost cloth or cover the base of the plant with more mulch. This is especially useful for protecting young the tender canes of young climbers as they get more established through their first winter. The second season they likely won't require any covering at all. 

With theses simple steps, your first year climbers should stay protected through winter and be ready for a strong start in the spring!