Centaurea ×moncktonii, Centaurea × gerstlaueri, is a hybrid perennial forb, resulting from a cross between black knapweed (Centaurea nigra) and brown knapweed (Centaurea jacea). It typically grows 20-40 inches tall with branched stems and taproots. The flowers are pink to reddish-purple and bloom from mid-summer to early fall, adding a splash of color to the landscape. This plant is known for its ability to reproduce both by seed and root fragments, which contributes to its invasive nature in non-native habitats.

Centaurea ×moncktonii thrives in a variety of habitats, including meadows, grasslands, and disturbed areas. It is often found in open, sunny locations with well-drained soils. In cultivation, it requires minimal maintenance and can tolerate drought conditions once established. However, due to its invasive potential, it is not recommended for garden use in areas where it can spread uncontrollably. It is important to manage its growth to prevent it from outcompeting native species and forage plants. Gardeners should be cautious and check local regulations before planting, as Centaurea × moncktonii is considered invasive in some regions.CC BY-SA 4.0