Cut or pinch the stems, Do not prune during shooting season, Prune regularly, Prune to stimulate growth, Remove dead leaves, Remove dead or diseased plant parts, Remove deadheads
A hard prune may be necessary if the plant becomes woody, Cut leaves after fall, Cut or pinch the stems, Pinch or prune as they grow to promote branching and bushiness, Prune for shortening long shoots, Prune in early summer, Remove deadheads