How to prune knock out rose

Late winter to early spring when new red shoots are just visible on canes. Cut all canes back to 12–18 inches (adjust for your zone). Make cuts at a 45-degree angle just above an outward-facing bud. First remove dead, diseased, and damaged wood, then reduce healthy canes to the target height.

Once a year; avoid pruning after midsummer. Knock Out roses bloom on new wood and are forgiving of hard pruning. Cut back once a year in late winter or early spring — to about 12 inches in colder zones, or 18 inches or more in warmer climates. This keeps the plant a manageable 3–4 feet. No deadheading is needed; petals drop cleanly on their own.

Cut all canes back to 12–18 inches (adjust for your zone). Make cuts at a 45-degree angle just above an outward-facing bud. First remove dead, diseased, and damaged wood, then reduce healthy canes to the target height.