Persian Cornflower, Knapweed
Centaurea dealbata 'Steenbergii'

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

Category:

Perennials

Foliage Color:

Blue-Green

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

Height:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

Spacing:

15-18 in. (38-45 cm)

18-24 in. (45-60 cm)

Hardiness:

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

Danger:

N/A

Bloom Color:

Pink

Bloom Time:

Late Spring/Early Summer

Mid Summer

Foliage:

Herbaceous

Velvet/Fuzzy-Textured

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

Regional

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

Chester, Massachusetts

Huntington, Massachusetts

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Jun 20, 2009, Daylahmnas from Chester, MA (Zone 3b) wrote:

This centaurea found its way into my garden simply because I wanted variety and was purchasing the centaurea montana. Three years later this dealbata has outgrown the montana and is a better and more significant addition to the garden than the original montana decision. The leaves on the centaurea dealbata are different than any other plant in the expanse of the flower field while its flower is soft in texture and hot pink in color it makes a statement from near and far. Casual garden guests find this plant striking and are often interested in aquisition. Last year, the second year of it's life here in the expanse, it had to be divided and now I have three of this treasured plant. This year the original plant is 3 ft. tall and the same wide. It will be divided again. It is growing in p... read more