The Common Rock Rose (Helianthemum nummularium) grows wild in the UK but mainly on chalky downs and rocks. If you have planted rock rose in your garden, it is more likely to be the "Peggy Sammons" rock rose (Cistus × argenteus). The Royal Horticultural Society recommends pruning in mid to late spring.
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Things you need
- Pruning shears
Grasp one of the vertical stems on the rock rose and trace it back to the base of the plant. Press your fingernail gently into the stalk until you reach an area near the base that feels harder than the remaining stem. This is the woody section of the stem.
Cut the stem off approximately 1.2 cm (1/2 inch) above the woody section of the stem using pruning shears.
Cut all of the remaining rock rose stems back to the same height, using the first cut stem as a guide. Use pruning shears to make the cuts.
Rake up all of the cut stems from the ground and place them into a compost pile or the rubbish bin.
Tips and warnings
- Rock roses bloom on new growth, so severe cutting back does not prevent the bush from blooming that year. However, the RHS reports that the plant does not respond well to heavy pruning.
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