How to prune rose of sharon 'diana'

Late winter to early spring, before buds break. Reduce all main stems by one-third to one-half with clean loppers. Cut out any dead or crossing branches at the base, and thin the center to improve light penetration and air circulation.

Annually. Yes, Rose of Sharon 'Diana' blooms on new wood and responds well to annual pruning in late winter or early spring. Cutting stems back by one-third to one-half promotes stronger growth and a heavier flower display. Also remove dead, crossing, or weak wood to maintain an open, airy framework.

Reduce all main stems by one-third to one-half with clean loppers. Cut out any dead or crossing branches at the base, and thin the center to improve light penetration and air circulation.