How to Prune commonName:"rhododendron 'Cosmopolitan'"?
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.

commonName:"rhododendron 'Cosmopolitan'" · Rhododendron 'Cosmopolitan'
Grow in moist but well-drained, humus rich acid soil in a sheltered position in part shade; see rhododendron cultivation
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.