Mountain Cornflower, Mountain Bluet, Perennial Cornflower
Centaurea montana 'Amethyst in Snow'

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Centaurea (sen-TAR-ee-uh) (Info)
Species: montana (MON-tah-nuh) (Info)
Cultivar: Amethyst in Snow
Additional cultivar information:(PP18284)
Hybridized by Sahin
Registered or introduced: 2006

Category:

Perennials

Height:

18-24 in. (45-60 cm)

Spacing:

15-18 in. (38-45 cm)

18-24 in. (45-60 cm)

Hardiness:

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:

Sun to Partial Shade

Danger:

N/A

Bloom Color:

Purple

White/Near White

Bloom Time:

Late Spring/Early Summer

Foliage:

Herbaceous

Velvet/Fuzzy-Textured

Other details:

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Patented

Propagation Methods:

By dividing the rootball

From seed; direct sow outdoors in fall

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

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

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

,

Rosamond, California

San Jose, California

San Leandro, California

Colorado Springs, Colorado

Kiowa, Colorado

Stamford, Connecticut

Idaho Falls, Idaho

Chicago, Illinois

Downers Grove, Illinois

Fairfield, Illinois

Hinsdale, Illinois

Greenville, Indiana

New Paris, Indiana

Dracut, Massachusetts

Winchester, Massachusetts

Pinconning, Michigan

Saint Paul, Minnesota

Munsonville, New Hampshire

Henrietta, New York

Elizabeth City, North Carolina

Winston Salem, North Carolina

Franklin, Ohio

Hamilton, Ohio

Williamsburg, Ohio

Gresham, Oregon

Portland, Oregon

Walterville, Oregon

Wilkes Barre, Pennsylvania

Brandon, South Dakota

Knoxville, Tennessee

Kaysville, Utah

Penhook, Virginia

Bellevue, Washington

Freeland, Washington

Highland, Washington

Hartford, Wisconsin

Lake Delton, Wisconsin

Sundance, Wyoming

show all

Gardeners' Notes:

2
positives
2
neutrals
0
negatives
RatingContent
Positive

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

This was planted in my garden May of 2010 and was purchased at the Local Home Depot and so far it growing with great success. Today is May 27th and the plant is in full bloom with more blooms to come getting it's afternoon sun till dusk. This plant should do well like my Montana Blue I will assume this will grow the same as my Montana Blue and will treat it the same.. Montana Blue: transplants easy so you can give small ones away to friends and at times there are many to give away! I do cut them down around July due to how tall they get they do seem to fall down leaving a bare center, but cutting them back about 2-3 inches from the ground brings new growth and a second bloom as well.

Neutral

On Mar 23, 2009, zak1962 from Pittsburgh, PA wrote:

I'm amending my original post and changing from a 'Positive' to a 'Neutral'. After it's initial beautiful show most of these plants have developed what I believe to be mildew problems.. I'm not 100% sure on this. This lower leaves are actually browning out as if all the energy in the plant is leaving them to produce flowers. Several have become plain unsightly. I'm cutting them back to regenerate growth, but until then the jury is out!

By the way, ignore what I said about controlling these plants. I also have several Mountain Bluet that I moved last fall. No matter how much I dig I keep getting start-ups from the orginal plants roots.

My original comments...

"I purchased one of these is 2006. In early 2007 I was able to take some rooted... read more

Positive

On Nov 10, 2008, mycatdave from Brandon, SD wrote:

I also liked the looks of this plant; both the flower and growing habit, so I purchased it through mail order from a comany i had bought from before. It has done very well in my garden, and will seed out around the area. It is not invasive; thus the little new plants are welcomed. I have a blue one and the white one. I have grown it in full sun as well as part shade. We get very cold winters here; but it winters well in the garden.

Neutral

On Nov 6, 2008, Sheila_FW from Fort Worth, TX (Zone 8a) wrote:

I loved the look of the plant when a friend purchased one for each of us from a Botanic Garden sale; they were in full bloom (see my pictures I posted). However in our area they suffered greatly. Not sure if it was the heat of our Texas summers. Mine was in partial shade and lasted a bit longer than hers.