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Centaurea Species, Meadow Knapweed

Centaureajacea subsp. jacea

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Family
Asteraceae (ass-ter-AY-see-ee)
Info
Genus
Centaurea (sen-TAR-ee-uh)
Info
Synonym
Centaurea pratensis
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
Spacing
24-36 in. (60-90 cm)
Hardiness

Unknown - Tell us

Danger

Unknown - Tell us

Bloom Color
Magenta (pink-purple)
White/Near White
Bloom Time

Unknown - Tell us

Other Details
Category
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color

Unknown - Tell us

Where to Grow

Unknown - Tell us

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

Unknown - Tell us

Other details
May be a noxious weed or invasive
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
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; direct sow after last frost
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

Battle Ground, Washington

Cherry Grove, Washington

Dollar Corner, Washington

Lewisville, Washington

Meadow Glade, Washington

Venersborg, Washington

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Widget9
Battle Ground, WA (Zone 7b) | July 2009 | negative

This plant is also on the noxious weed list for Clark County in Washington and eradication is required by the land owner. And boy does th...Read More

C
C
caron
Woodland Park, CO (Zone 4b) | November 2004 | negative

Colorado Class A Noxious Weed. Mandatory eradication.
All locations of this plant in Colorado should be immediately reported to th...Read More

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