Answer: The common name rock rose usually translates to Helianthemum nummalarium, a low-growing perennial plant with a short bloom period (late spring to early summer). It's used as a groundcover, in a rock garden, or tumbling over a rock wall. Rock rose grows well on dry, sunny slopes and tolerates heat and drought. It thrives in well-draining sandy soils, performing poorly in rich, loamy soils. Prune the plants back after flowering and mulch over the crowns of the plants to provide winter protection.
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