Centaurea Species, Yellow Knapweed

Centaureaorientalis

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Centaurea (sen-TAR-ee-uh)
Species
orientalis (or-ee-en-TAY-liss)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Provides Winter Interest
This plant is resistant to deer
Height
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Spacing
15-18 in. (38-45 cm)
Hardiness
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)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
Danger
N/A
Bloom Color
Bright Yellow
Bloom Time
Mid Summer
Late Summer/Early Fall
Other Details
Category
Alpines and Rock Gardens
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
Patent Information
Propagation Methods
From herbaceous stem cuttings
Seed Collecting
Regional

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

Norristown, Pennsylvania

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Gardener's Notes:

1
positive
0
neutral
0
negative
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Greenville, IN (Zone 6a) | February 2009 | positive

This is a go in my garden for sure! It is covered with Fritillary butterflies spring/early summer when the blooms are almost gone they st...Read More

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