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Cornflower Aster

Stokesia laevis (STOK-see-ah LAY-viss)

Family: Asteraceae Unknown Herbaceous (1-3 ft)

‘Blue Danube’ is a cultivar of the native Stokes' aster, which is in the daisy family (Asteraceae). It is a showy, herbaceous perennial that is named for the Danube River because of its lavender-blue-colored flowers. Growing 12 to 18 inches tall and wide, it attracts bees, butterflies, and hummingbirds and is low maintenance, drought tolerant once established, heat tolerant, and deer and rabbit resistant. Plant ‘Blue Danube’ in sun to partial shade and moist, well-drained soil. It is best to remove the flowers when faded to encourage new buds. When the plant has completed blooming, it may be cut back to its basal foliage. In warmer climates, the leaves may be retained throughout the winter months. The plants may need to be divided about every three to four years. Divisions may be done in the spring and fall. With its fluffy, pale lavender to bluish, cornflower-like blooms, ‘Blue Danube’ can be enjoyed in many different settings, including pollinator, butterfly, cottage, and rain gardens. Use it along a walkway or in borders, small groups, mass plantings, or containers. Insects, Diseases, and Other Plant Problems: No significant problems. More information on Stokesia laevis .

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 59 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (1-3 ft) Optimal soil pH Acid (<6.0); Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Fills a similar niche Eryngium planum Lantana camara 'Miss Huff' Salvia rosmarinus

Full plant profile

Growing Conditions
Plant type
Herbaceous Perennial
Life cycle
Perennial
USDA zones
5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Clay; Loam (Silt); Sand
Soil pH
Acid (<6.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist | Occasionally Dry
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 1 ft. 0 in. - 1 ft. 0 in. | Width: 1 ft. 0 in. - 1 ft. 6 in.
Growth rate
Medium
Maintenance
Low
Canopy layer
4 - Herbaceous (1-3 ft)
Form & Appearance
Habit / form
Mounding; Spreading
Texture
Medium
Leaf color
Green
Leaf type
Simple
Leaf arrangement
Alternate
Leaf shape
Elliptical; Lanceolate
Leaf margin
Dentate
Leaf feel
Leathery
Leaf size
3-6 inches long, < 1 inch wide
Hairs present
Yes
Leaf detail
The plant begins as a basal rosette with straplike leaves. The leaves grow in low mounds and appear leathery. The leaves are dark green, hairy, medium-sized, lanceolate to elliptic in shape, and have an alternate arrangement. They measure 6 inches long, but the basal leaves are larger than the stem leaves. The leaf margins are dentate near the base of the plant.
Flower color
Blue; White
Flower value
Long-lasting; Showy
Flower form
Head
Flower shape
Radial
Flower size
1-3 inches
Flower detail
The flower is solitary, somewhat daisy-like, and appears at the top of the stem. The bloom measures 2 to 4 inches across. The flower head is pale lavender to blue in color and has many tubular disk florets which are surrounded by deeply divided, thin petal/rays. A prominent white stigma is present in the center of the flower. Stokes' asters bloom typically from May to September. The flowers have a delicate fragrance.
Bloom time
Summer
Fruit color
Brown/Copper
Fruit type
Achene
Fruit size
< 1 inch long, < 1 inch wide
Fruit detail
The fruits are small achenes. A mature seed is brown, papery, and about 1/4 inch long.
Stem color
Green
Stem detail
The hairy stems are 12-18 inches tall, erect and arise from a basal rosette.
Wildlife & Ecology
Native status
Unknown
Wildlife value
Pollinator and nectar plant for bees, butterflies, and hummingbirds
Attracts
Bees; Butterflies; Hummingbirds
Food & Medicine
Harvest time
Fall
Fruit type
Achene
Landscape Use
Landscape location
Container; Patio; Pond; Small Space; Walkways
Landscape theme
Butterfly Garden; Cottage Garden; English Garden; Pollinator Garden; Rain Garden
Design feature
Border; Mass Planting; Small groups
Garden tags
#rabbit resistant #low maintenance #drought tolerant #showy flowers #border planting #summer flowers #blue flowers #long-lasting flowers #deer resistant #butterfly friendly #bee friendly #pollinator plant
Problems & Resistance
Resistant to
Deer; Drought; Heat; Rabbits
Particularly resistant to
drought, rabbit
Propagation
Division

Planted at Hunnicutt

Nobody’s planted this one yet.