Silene uniflora (Sea Campion)

USDA Hardiness Zones: 4–8

Light: Full sun to mostly sunny

Mature Size: 4–6" tall | 8–12" wide

Attracts: Pollinators

Bloom Time: Late spring to early summer

Water Needs: Low to moderate once established

Soil: Well-drained, sandy, gravelly, or rocky soils

Growth Habit: Low-growing, mounding perennial

Flowers: Crisp white, slightly inflated blooms rising above compact cushions of blue-green foliage

Ideal For: Rock gardens, xeriscapes, containers, edging, coastal-style plantings, low-water landscapes

Evergreen: Semi-evergreen to evergreen in mild climates

Why We Love It:
Sea Campion forms neat mounds of blue-green foliage that stay attractive throughout the season, bringing soft texture and structure to rock gardens and gravel plantings. In bloom, the bright white flowers seem to float above the foliage, creating a clean, understated look that pairs beautifully with stone and alpine plants. Tough, adaptable, and drought tolerant once established, it’s an easy choice for sunny gardens with excellent drainage.

Additional Info:
Native to coastal regions of Europe where it naturally grows in rocky, sandy conditions. Performs best in lean soils with sharp drainage and is especially well suited for troughs, gravel gardens, containers, and alpine-style landscapes. Avoid overly rich or consistently wet soils.