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

rhododendron 'Viscy' · Rhododendron 'Viscy'
Grow in moist but well-drained, leafy, humus-rich, acid soil in part shade with shelter; see rhododendron cultivation
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.