common knapweed · Temperature

common knapweed · Centaurea nigra
Also known as: bell weed; black centaury; black knapweed; bowl weed; bull weed; button weed; churl's head; club weed; crop weed; hard weed; hardhead; hardheads; horse knops; horse knots; iron hard; iron heads; iron weed; knob weed; knot weed; lesser knapweed; loggerheads; nob weed; Spanish buttons; sweeps; tassel

Prefers a well-drained fertile soil in a sunny position. Tolerant of dry, alkaline soils and established plants are tolerant of considerable neglect. Self-seeds readily and can become invasive

Watering: Moderate regular watering, allowing brief slight drying between soakingsSunlight: Full sun · Partial shadeInformation to be completed