Photo of Mertensia maritima flower by Danielle Langlois

Photo by Danielle Langlois

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Mertensia maritima

Also Known As

  • Oysterleaf

Plant type

perennial, groundcover

size

  • H: 4"
  • W: 12"

planting zones

  • 4a-10b

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Mertensia maritima plant details

Mertensia maritima is a broadleaf deciduous perennial groundcover with blue foliage. In spring and summer blue and pink flowers emerge. Features glaucous texture. Grows well with sun - shade and regular water. Does well in average, gritty, rocky and well-drained soil.

CHARACTERISTICS OF Mertensia maritima

Plant type: perennial groundcover
Plant family: boraginaceae
Foliage: deciduous blue
Mature size: 12 IN wide, 4 IN tall
Flowers: blue and pink blooms in spring and summer
Uses: native plant, rock garden, woodland garden

GROWING CONDITIONS for Mertensia maritima

USDA Zones: 4a - 10b
Sun exposure: sun - shade
Watering frequency: regular
Soil needs: average, gritty, rocky and well-drained

Nursery contributed plant descriptions

Love this plant and we'll never garden without it. From the northern beaches of New England to Greenland and Japan to Alaska comes this beaut. Lustrous blue leaves and terminal clusters of small sky blue flowers puts this in a class all by itself. The possibilities of dynamic contrast with other plants makes you realize you just don't have enough room to capitalize on all the great ideas that come flooding in. Don't get bogged down and enervated by the choices - go with the first one - it will be great! Excellent spiller for containers if fed well. Loves a moist rich soil where it can easily be 3 feet across. Goes dormant in the fall so just nip off the stems and you are done with maintenance on this until the same time next year. Our kind of plant.
We are completely smitten with this rare, scrumptious wildflower. It grows (& glows!) along the beaches of New England, Greenland, & Ireland with irresistible sky blue, rounded leaves, whose lustrous “bloom” (like the finish on grapes) is sensitive to the touch. It has a low habit, growing 4” tall & about 1’ wide, & though it would probably prefer beach-front housing, would do equally well in a largish pot, at the edge of a garden bed, or in a rock garden. Needing average water & moderate soil fertility, I would definitely bait for snails, lest you let this delicacy go to waste! The beautiful flowers are pink in bud, & fade to blue with age, & are produced in clusters at the end of the stems from Spring through Summer. The leaves are reported to taste like oysters, which gives this plant its common name.

Gardening facts about Mertensia maritima plant

How to Grow Mertensia maritima

  • Sun Exposure

    • sun - shade
  • Water Needs

    • regular
  • Soil Needs

    • average
    • well-drained
    • rocky
    • gritty

Features

  • Foliage Color

    • blue
  • Flower Color

    • pink
    • blue
  • Flower Season

    • summer
    • spring
  • Foliage Season

    • deciduous
  • Texture

    • glaucous
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