Common knapweed
Centaurea nigra
Common knapweed is a hardy wildflower that thrives in well-drained soils with minimal intervention, making it ideal for naturalistic or meadow-style plantings. Water occasionally during dry spells but avoid waterlogging, as it tolerates mild drought once established. It self-seeds readily, so deadhead spent flowers if you wish to control spreading.
Care Level
Low
Sun
Partial Shade
Water
Moderate
Growth Rate
Moderate
Mature Height
12″ – 36″
Soil
loam
Life Cycle
Perennial
Spacing
18″
Watering Schedule
Every 10-14 Days • Water Moderately; Allow Soil To Partially Dry Between Waterings
Soil pH
6 – 7.5
Temperature
-50° – 85°F
Mature Spread
up to 24″
Root Depth
Medium
Foliage
Medium
Propagation: Seed
Native to
Attracts
Sources
Data: trefle, usda
Image: trefle.io — Taken Oct 22, 2018 by Wim Cornelissen (cc-by-sa)
No nurseries currently have this species in stock.