Skip to content
GardensDB
Discover
People & studios
Organisations
Account
Follow
gardensdb on Instagram (opens in a new tab)
Centaurea nigra
Plant

Centaurea nigra

Common Knapweed

Planted in 2 show gardens on GardensDB.

2
Gardens
5
Designers
0
Studios
Buy this plant (opens in a new tab) Opens the supplier's website
How to grow it

Happiest in full sun or partial shade on chalk, clay, loam or sand that is well-drained or moist but well-drained.

Size at maturity
0.5–1 metres Max height
0.5–1 metres Max spread
2–5 years To maturity
Aspect
Aspect: North-facing, East-facing, South-facing, West-facing N E S W
Any aspect Happy facing any direction
Position
Full sun (suitable)
Partial shade (suitable)
Full shade (not suitable)
Exposure
Sheltered (suitable)
Exposed (suitable)
Moisture
Well-drained or moist but well-drained
Soil
Chalk (suitable)
Clay (suitable)
Loam (suitable)
Sand (suitable)
Soil pH
Acid (suitable) Neutral (suitable) Alkaline (suitable)
Hardiness H7. Very hardy Very hardy (colder than -20°C)
H1a
H1b
H1c
H2
H3
H4
H5
H6
H7
Where it was planted

2 gardens

  • A tranquil show garden featuring a rustic dry stone wall structure with wooden beams, a flagstone path, wooden seating, and abundant naturalistic planting with a twisted dead tree and a circular metal tree bench.
    Gold Medal People's Choice Best Show Garden
    360° tour available
    Lifted by Birds
    Tom Saunders, Jon Pilling, Amie Wheeldon
  • A small pocket planting garden featuring a reclaimed timber bench with a yellow base and red metal beam, surrounded by mixed herbaceous plants and small trees.
    Silver Medal
    360° photo available
    Before the Concrete Sets
    Nathan Humphreys, Helen Haley
Who uses it

Designers & studios

The people and studios credited on the gardens above, and how many gardens they used this plant in.

Designers 5

Good company

Often planted with

Plants that share a plant list with Centaurea nigra, ranked by how many gardens combine them.