Northwest Blooms · Groundcovers
Mertensia maritima
Oyster Leaf
- Family
- Boraginaceae
- Height
- 6 to 12 in
- Width
- 12 to 18 in
- Flower color
- Pink buds opening to soft sky blue
- Foliage color
- Blue-green to silvery blue, thick, smooth, and waxy leaves
- Bloom time
- Late spring to early summer
- Light
- Full sun to partial shade
- Water
- Moderate moisture, prefers cool, well-drained soils and consistent watering during growth
- Maintenance
- Moderate, benefits from cool conditions, mulch to keep roots cool, avoid hot, dry exposure
- Growing zone
- USDA zones 3 to 8
- Wildlife
- Bees, butterflies, other pollinating insects
About this plant
Mertensia maritima forms low, spreading clumps of thick, rounded leaves coated in a soft blue-gray bloom that gives the plant a silvery, seaside appearance. The foliage hugs the ground and creates a sculptural presence even before flowering begins. Nodding buds open from pink to clear sky blue, forming loose clusters that gently arch above the leaves.
Blooming from late spring into early summer, this species is native to coastal regions of northern Europe and North America. It suits rock gardens, coastal-style plantings, and gravel beds, where its unusual foliage color and delicate flowers create a calm, natural accent.
Works well in
Coastal Gardens · Rock Gardens · Containers · Pollinator Gardens
Companion plants
Thyme · Rockroses · Armerias · Lavender · Sedums · Blue oat grass
Design tip
Plant this coastal perennial among gravel and stone where its silvery foliage and soft blue flowers can stand out naturally. Combine drought-tolerant companions with contrasting forms and repeating textures to create a relaxed planting that reflects the character of seaside landscapes.
Where to see it
This plant can be seen at Windcliff Garden.
