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

hoary cistus · Cistus creticus subsp. incanus
Also known as: rose cistus
Grow in poor to moderately fertile, well drained soil, in a sheltered position in full sun. Plant out when danger of frosts has passed. Generally lime-tolerant, but may become chlorotic on very chalky soils
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.