White Rockrose

White rockrose (Cistus × corbariensis, Cistaceae; now accepted as C. × hybridus) is a broadleaf evergreen shrub of hybrid origin (C. salviifolius × C. populifolius) from southern Europe, reaching 2 to 5 feet tall with a dense, bushy form. Ovate to cordate leaves (2 to 5 centimeters) have wavy margins and are dull dark green above. White flowers (3.5 centimeters wide) with yellow centers and yellow spots at the petal base appear in spring, solitary or in groups of three. It is considered one of the hardiest Cistus species.

White rockrose grows in full sun on well-drained sites and is drought and salt tolerant (coastal), hardy in Zones 7 to 8. Documented disease associations include root rot; root weevil is the primary pest. No cultivars are in the trade.