Pink Persian Cornflower, Knapweed 'Rosea'

Centaurea dealbata

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Centaurea (sen-TAR-ee-uh) (Info)
Species: dealbata (day-al-BAH-tuh) (Info)
Cultivar: Rosea



Foliage Color:


Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


18-24 in. (45-60 cm)

24-36 in. (60-90 cm)


15-18 in. (38-45 cm)

18-24 in. (45-60 cm)


USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

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:

Late Spring/Early Summer

Mid Summer




Other details:

Unknown - Tell us

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:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

From seed; direct sow after last frost

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


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

Corydon, Indiana

Bellevue, Michigan

Grand Haven, Michigan

Republic, Missouri

Albuquerque, New Mexico

Hugo, Oklahoma

Gresham, Oregon

Coatesville, Pennsylvania

Kalama, Washington

Kendall, Washington

show all

Gardeners' Notes:


On Jun 24, 2012, avlind from Coatesville, PA wrote:

I also happened upon this plant in the clearance section of a nursery. Its blooming time in Pa. is spring -a time I needed more blooming plants. The only problem is that all the stems fall over. This year I tied a string around the whole plant but next year I will look for a wire plant holder.


On Apr 25, 2010, rweiler from Albuquerque, NM wrote:

I think I found this plant somewhere random like Walmart. I was a novice gardener at the time and didn't know what to do with it and what to expect. I moved it several times in the first year. Once it finally found it's home (full sun and that means SUN it New Mexico) it has thrived with little water and little attention. It doesn't bloom in abundance but has beautiful foliage and shape. I divided it at 2 years and it never missed a beat. It is hard to find plants in New Mexico (Arid, very Akaline, Zone 6-7) that are indestructable. This plant has become a surprising favorite.