Rock Rose (Helianthemum mutabile) is a low-growing evergreen shrub that thrives in zones 5 to 7, reaching just 6 to 12 inches tall but spreading to 24 to 36 inches wide. From May through July, it produces delicate five-petaled flowers about an inch across that open pink, mature to lilac, and fade to white, with each bloom lasting just a single day but appearing in succession throughout the season. This Mediterranean native handles drought with ease and asks little in return: full sun, well-drained soil, and moderate care. It spreads by creeping stems, making it exceptional as a ground cover or for naturalizing rocky slopes where other plants struggle.
12
Full Sun
Moderate
5-7
12in H x 36in W
—
High
Hover over chart points for details
The flowers themselves tell a story: opening pink and shifting through lilac before fading to white, each one opens for just one day, yet the plant maintains continuous bloom for up to two months in late spring and early summer when conditions suit it. Its evergreen foliage stays silvery and attractive year-round, and once established, it shrugs off drought entirely. This is a plant for gardeners who want color and movement without fuss, thriving in the lean, rocky soils where conventional shrubs simply give up.
Rock Rose serves as a ground cover and naturalization plant, particularly on slopes, in rock gardens, and in areas too dry or too alkaline for most shrubs. When grown as a ground cover, space plants 2 to 3 feet apart to allow them to spread and knit together over time, creating a dense mat of evergreen foliage punctuated by months of delicate blooms.
No timeline data available yet for this variety.
Space plants 2 to 3 feet apart when planting as a ground cover. Plant in full sun in well-drained, alkaline, rocky, or sandy loam.
Shear Rock Rose after flowering to shape the plant and encourage additional growth, keeping it compact and dense. Regular pruning prevents the woody stems from becoming bare and leggy.
Enter your ZIP code to see a personalized growing calendar for this plant.
“Helianthemum mutabile belongs to a genus of about 110 species spread across North and South America, Asia, Europe, and North Africa, with particularly strong representation around the Mediterranean region. The genus name itself reflects ancient Greek: helios for sun and anthemon for flower, a fitting tribute to plants that follow the light and bloom prolifically in sun-baked terrain. Rock Rose species have been valued by gardeners for centuries as hardy, low-maintenance groundcovers in climates too dry or too rocky for conventional ornamentals.”