When to prune? Roses are best pruned in the spring. In Kansas City, prune during the first week or two of April, after the threat of frost has passed. Why prune every spring? Encourages more flower production; Improves the health of the bush by opening the center of the plant to light and airflow; Removes damaged and diseased canes. Sep 25, Pruning on these plants is best done in late winter or early spring, as the flowers are set on the lush growth produced in the spring season.
Roses confuse a number of people. You have probably already guessed it but roses bloom on new wood. Rose canes can be subject to winter injury during a cold season. Pruning these shrubs during the dormant season does not harm the health of the plant, but it does remove the flowers. Pruning just after they finish flowering produces the greatest amount of flowers for next year. season.
Use the following table to determine the right time to prune your shrubs in the greater Kansas City area. Legend:= Best time to prune: x = Do not prune except to correct damage, hazards, or structural defects Revised for Kansas and Kansas City area conditions by Dennis Patton, Johnson County K-State Research and Extension Horticulture.