Centaurea rothrockii
Family: Asteraceae
Common names: HARDHEADS, KNAPWEED, STAR THISTLE
Native to: Northern Mexico, South Central United States, Southwest United States
Plant
Type: annual
Forms: clumping, erect
Max height: 3.3 feet
Max width: 3.3 feet
Flower
pink, secondary color present, violet
Leaf
green
Horticulture
Attracts wildlife: adult butterfly, specific butterfly species
Exposure: sun
Propagates by: seed
flowers in fall
flowers in summer
Soil type: wide range
USDA Zones: zone 6 to -10 f, zone 7 to 0 f, zone 8 to +10 f, zone 9 to +20 f
Temp. range: -10 to +30 °F
Water: moderate
Butterflies that feed on this plant
