Oenothera macrocarpa ssp. incana Silver Blade®

Scientific Name: Oenothera macrocarpa ssp. incana

Also Known As

Oenothera macrocarpa incana 'Silver Spear'
Oenothera macrocarpa ssp. incana 'Silver Blade'
Silver Blade® Evening Primrose
Silver Spear Missouri Evening Primrose

Plant type

perennial

size

H: 6"-12"
W: 15"-18"

planting zones

4a-10b

More Options

Oenothera macrocarpa ssp. incana Silver Blade® plant details

Oenothera macrocarpa ssp. incana Silver Blade® is a broadleaf deciduous perennial with blue foliage. In fall, spring and summer yellow flowers emerge. Grows well with sun and regular - low water. Drought tolerant once established. Adapts to various soil conditions. Does well in average, gritty, lean and well-drained soil. A good option if you're seeking something heat tolerant and verticillium wilt resistant.

CHARACTERISTICS OF Oenothera macrocarpa ssp. incana Silver Blade®

Plant type: perennial
Plant family: onagraceae
Foliage: deciduous blue
Mature size: 15 IN - 18 IN - wide, 6 IN - 12 IN - tall
Flowers: yellow blooms in fall, spring and summer
Uses: container plant

GROWING CONDITIONS for Oenothera macrocarpa ssp. incana Silver Blade®

USDA Zones: 4a - 10b
Sun exposure: sun
Watering frequency: regular - low
Resistant to: deer, heat and verticillium wilt
Soil needs: average, gritty, lean and well-drained

Nursery contributed plant descriptions

Huge yellow flowers (May to frost!) complemented by SILVER-blue foliage make this wildflower of the southern Prairies a lovely addition to any drought-tolerant/xeriscape garden. S/M-D/GDr

By: Forestfarm

Oenothera macrocarpa ssp. incana 'Silver Blade' is a stunning evening primrose with huge, lemon yellow flowers four inches across on red stems from spring until fall, either constantly or in waves. Deadhead to encourage more flowers. Foliage is lance-shaped, rippled, silver-blue to blue-green contrasting beautifully with the flowers. It will form a lush yet drought tolerant groundcovering mat perfect for lean, gritty soils in rock gardens, gravel gardens, along driveways, on banks, trailing over walls or in other xeriscapes or in containers. Easy to grow. Shear down in fall or early spring.

By: Phoenix Perennials and Specialty Plants Ltd.

Low growing rosettes of intensely silver broad leaves. The foliage display would be reason enough to grow it, but the flowers are also extremely large and a beautiful shade of pale yellow. Zone 4.

By: Arrowhead Alpines

Lance shaped leaves of ghostly silver on 1' tall and spreading plants are well suited for the 3" wide lemon drop yellow summer flowers. An excellent plant.

By: Dancing Oaks Nursery

A southern Great Plains endemic introduced by James Locklear, further promoted by Bluebird Nursery, Clarkson, Nebraska. Silver leaves compliment the clear yellow flowers. Best on well drained sites. Blooms May to frost. Drought tolerant. Perennial. Xeriscape. Easy in average garden soil. USDA zones 4a-9 (up to 8,000').

By: Plant Select®

Exceptionally long blooming, & HEAT & DROUGHT TOLERANT! This new selection of “Missouri Evening Primrose” made by James Lockyear bears huge 4”-across delightful, bright yellow, silky blooms from May-September - especially with dead-heading. Clump forming to 6-10” tall & 18” across, this reliable newbie boasts stand-out soft silvery-blue wavy foliage. TOUGH AS NAILS, this bloomiferous ground-covering perennial makes a superb long-lived choice for the front of a dry garden as it will spill attractively over the edge of a bed. Tolerating poor soil, it’s also a good choice for low-care situations as well ascontainers, too. For tip-top appearance, remove spent blooms, cut back in Winter & add a dollop of compost in the Spring. EASY!