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Mountain Bluet

Centaurea montana (sen-TAR-ee-ah mon-TAY-nah)

Family: Asteraceae Non-native Herbaceous (1-3 ft)

Mountain Bluet is an erect, clump-forming perennial flower which is native to Europe. Genus came from the popular name of various plants in the late 14th century, from Medieval Latin centaurea, from Latin centaureum, from Greek kentaureion, from kentauros "centaur", so called because the plant's medicinal properties were discovered by Chiron the centaur. Specific epithet means pertaining to mountains or coming from mountains. It is known for it's solitary, fringed, rich blue cornflowers with reddish blue centers and black-edged involucre bracts. Easily grown in average, dry to medium moisture, well-drained soils in full sun, Mountain Bluet are drought tolerant and tolerant of poor soils. It propagates two ways: by stolons, which rapidly form colonies when optimum growing conditions exist, or by seed. If deadheaded after bloom, you may get some additional blooms in the fall as well as the deadheading controlling the seeds. Plants need to be divided every 2-3 years. Summer into fall, fringed, rich blue cornflowers with reddish blue centers apper in clusters. Place in a meadow, naturalized area and along walkways. Works well for the borders of pollinator, cottage and cutting gardens. Insects, Diseases, and Other Plant Problems: No significant problems.

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); Alkaline (>8.0); 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 Buddleja Lo & Behold® 'Blue Chip Jr.' Campanula persicifolia Phlox stolonifera

Full plant profile

Growing Conditions
Plant type
Perennial
Life cycle
Perennial
USDA zones
3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
Light
Full sun (6 or more hours of direct sunlight a day)
Soil texture
Clay; Loam (Silt); Sand
Soil pH
Acid (<6.0); Alkaline (>8.0); Neutral (6.0-8.0)
Soil drainage
Occasionally Dry
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 1 ft. 0 in. - 2 ft. 0 in. | Width: 1 ft. 0 in. - 1 ft. 6 in.
Growth rate
Rapid
Maintenance
Low
Canopy layer
4 - Herbaceous (1-3 ft)
Form & Appearance
Habit / form
Clumping; Spreading
Leaf color
Gray/Silver; Green
Leaf type
Simple
Leaf arrangement
Alternate
Leaf shape
Lanceolate
Leaf margin
Serrate
Leaf feel
Soft
Leaf size
> 6 inches long, < 1 inch wide
Hairs present
Yes
Leaf detail
Gray-green, lance-shaped lower leaves to 7" long
Flower color
Blue; Red/Burgundy
Flower value
Good Cut; Long-lasting; Showy
Flower form
Cyme; Head
Flower shape
Dome
Flower size
1-3 inches
Flower detail
Fringed, rich blue cornflowers with reddish blue centers and black-edged involucre bracts
Bloom time
Fall; Summer
Fruit color
Cream/Tan
Fruit type
Achene
Fruit size
< 1 inch long, < 1 inch wide
Fruit detail
Finely hairy, straw-colored at maturity with a tuft of short, stiff, light brown bristles at the tip.
Stem color
Gray/Silver; Green
Stem detail
Stems are erect, single or multiple from the base, hairy and usually unbranched, sometimes few-branched, 1 - 2 feet tall
Wildlife & Ecology
Native status
Non-native
Origin
Europe
Attracts
Bees; Butterflies
Play value
Colorful
Food & Medicine
Harvest time
Fall
Fruit type
Achene

Uses (ethnobotany)

Borders, cottage gardens and naturalized areas

Landscape Use
Landscape location
Meadow; Naturalized Area; Walkways
Landscape theme
Cottage Garden; Cutting Garden; Drought Tolerant Garden; Pollinator Garden
Design feature
Border; Mass Planting
Garden tags
#dry soils intolerant #blue flowers #clumping #spreading #low maintenance #drought tolerant #perennial #cutting garden #pollinator garden #naturalized area #full sun tolerant #cottage garden
Problems & Resistance
Resistant to
Wet Soil
Particularly resistant to
Drought tolerant
Propagation
Division; Seed

Planted at Hunnicutt

Nobody’s planted this one yet.