How to Make a Rockrose Bloom

Set out the rock rose in a well-drained sunny location. True to its Mediterranean origins, the plant requires little nutrition and perfect drainage. Amend heavy soil with one-third compost or soil conditioner, such as finely shredded bark. The more sun you give rock rose, the more it will bloom.

Pinch back new plants to encourage bushy growth in the same manner you would pinch back mums. Simply pinch off the top inch of the stems and let them grow back and double their number. If you begin pinching new plants in spring, do it only once, then allow buds to form for a late spring display. If you are willing to postpone blooming, pinch about 3 times, each about two weeks apart, for a fuller, more abundant display in early summer.

Deadhead spent flowers after rock rose blooms. Pinch out the deadheads with your fingers, or use sharp pruners or scissors. New buds will soon form and the plant will flower again. Repeat after each bloom, discontinuing when the plant stops blooming in late summer or early fall. As with any pruning job, disinfect tool blades before and after each use with rubbing alcohol to prevent the spread of disease.

Water at ground level only, rather than overhead. Damp leaves and buds are more likely to be affected by disease that can spoil the floral display. Once established, rock rose requires very little irrigation.