How to prune catawba rhododendron 'roseum elegans'

Immediately after flowering, late May to mid-June; all pruning must be finished before mid-August. Snap off spent flower trusses at the base without disturbing emerging growth buds. Cut back leggy or crossing stems by no more than one-third to a healthy lateral bud at a 45-degree angle. Rejuvenate overgrown plants by removing one-third of the oldest stems per year over three seasons.

Annually after bloom; rejuvenation over 3 years if overgrown. Prune shortly after blooming ends in late spring — this is the critical window. Roseum Elegans sets next year's flower buds from late July onward, so any pruning must be completed well before mid-August. Remove spent trusses first; then selectively shorten leggy stems. Minimal pruning suits this large, vigorous grower well.

Snap off spent flower trusses at the base without disturbing emerging growth buds. Cut back leggy or crossing stems by no more than one-third to a healthy lateral bud at a 45-degree angle. Rejuvenate overgrown plants by removing one-third of the oldest stems per year over three seasons.