Mountain Cornflower, Mountain Bluet, Perennial Cornflower 'Coerulea'

Centaurea montana

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Centaurea (sen-TAR-ee-uh) (Info)
Species: montana (MON-tah-nuh) (Info)
Cultivar: Coerulea



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


18-24 in. (45-60 cm)


18-24 in. (45-60 cm)


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)

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade


Unknown - Tell us

Bloom Color:


Bloom Time:

Mid Spring

Late Spring/Early Summer



Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

From seed; direct sow outdoors in fall

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

Direct sow as soon as the ground can be worked

From seed; sow indoors before last frost

From seed; direct sow after last frost

From seed; germinate in a damp paper towel

From seed; germinate in vitro in gelatin, agar or other medium

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:


Greenwich, Connecticut

Wilton, Connecticut

Chicago, Illinois

Downers Grove, Illinois

East Brookfield, Massachusetts

Lowell, Massachusetts

Saint Paul, Minnesota

Buffalo, New York

Rochester, New York (2 reports)

Wallkill, New York

Drexel Hill, Pennsylvania

Mountain Top, Pennsylvania

Seattle, Washington

Stanwood, Washington

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Gardeners' Notes:


On Jul 11, 2012, JanFRN from St. Albert,
Canada wrote:

This is one of the weediest plants I've ever had in my garden. I deeply regret the purchase of two of these that became parents-of-millions. They grow in my lawn, they grow in the neighbours' yards, they've crowded out my rock garden plants... and they think Round-Up is Miracle Grow. I'm going to be cutting down and digging out for years.


On May 27, 2011, Bazuhi from Downers Grove, IL (Zone 5a) wrote:

This was planted in my garden in 2008 given to me by a friend so not sure of the exact cultivator but it is growing with great success. I have it in both full sun and part-shade and all are doing well with many blooms.. Today is May 27th and the plant is in full bloom with many more blooms to come! This plant transplants easy so you can give small ones away to friends and at times there are many to give away! After quite a few years of growing this plant it has done exceptionally well!! I find small plants here and there more then not from seeds being dropped by the birds. I have shared this plant with so many people who also love it!! One down fall of this plant is when it gets tall it will have the tendency to fall over after a while especially when there is no rain and not enough water... read more


On Aug 11, 2010, Susini from Lake Park, MN wrote:

Bushy plant in the spring, peony-like as one commenter said. I'm not a fan of the foliage come mid-summer. I wouldn't say it's ratty, but it sort of withers. Self-sows easily and reblooms if cut back. I'd love the plant if the foliage stayed pretty.


On Jun 1, 2010, kobwebz from columbia, TN (Zone 7a) wrote:

Love this plant. some get to be as big and full as peony bushes, self sows alot, easy to move around in early spring..


On Nov 18, 2009, bonehead from Cedarhome, WA (Zone 8b) wrote:

I also experience problems with mildew. The answer for me is to cut them back hard when about through blooming (end of June). They fill back in quickly and give me a second bloom in September. And, yes, they reseed like crazy, but are easy to pull out where unwanted.


On May 25, 2009, JustMe48 from Rochester, NY (Zone 6a) wrote:

Mine are not ratty looking and I have no problem with moldew or mold in my area. They add pretty blue/purple color to my garden.


On May 12, 2009, anelson77 from Seattle, WA wrote:

These are weedy and very hard to get rid of, with deep roots and the ability to regrow from a fragment. They reseed like crazy. Also, they get mildewy and ratty looking in mid summer.

On the plus side, they do look pretty when blooming in late spring.