Mertensia Species, Gray Oysterleaf, Oyster Plant

Mertensia maritima

Family: Boraginaceae
Genus: Mertensia (mer-TEN-see-uh) (Info)
Species: maritima (muh-RIT-tim-muh) (Info)

Category:

Perennials

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Foliage:

Grown for foliage

Herbaceous

Smooth

Foliage Color:

Blue-Green

Height:

under 6 in. (15 cm)

Spacing:

24-36 in. (60-90 cm)

Hardiness:

USDA Zone 2a: to -45.5 C (-50 F)

USDA Zone 2b: to -42.7 C (-45 F)

USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Where to Grow:

Unknown - Tell us

Danger:

Unknown - Tell us

Bloom Color:

Pink

Light Blue

Dark Blue

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Summer

Other details:

Unknown - Tell us

Soil pH requirements:

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Non-patented

Propagation Methods:

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Seed Collecting:

Bag seedheads to capture ripening seed

Regional

This plant is said to grow outdoors in the following regions:

Birmingham, Alabama

Richmond, California

Gardeners' Notes:

2
positives
0
neutrals
0
negatives
RatingContent
Positive

On Oct 30, 2018, janelp_lee from Toronto, ON (Zone 6a) wrote:

Seeds take about one month to germinate. Keep seedlings away from bugs, snails and slugs! It is easy to propagate from offsets or small side shoots.

Best in full sun.

Positive

On Jul 12, 2017, Ted_B from Birmingham, AL (Zone 8a) wrote:

Fresh seed is important. Best observed germination rates when seeds are soaked overnight, then kept in refrigerated, moist sand. Seedlings are highly susceptible to damping off fungal diseases.

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