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Centaurea macrocephala (Yellow Hardhead, Giant Knapweed)

Type: Species | Edit History      Plant ID - 36963



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Kiasmum (123)

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Scientific Classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Asterales
Family: Asteraceae
Genus: Centaurea
Species: Centaurea macrocephala
 
Common Names add
Plant Types edit
  • Perennial
Zones / Hardiness edit
  • 5a (to -15 F / -26 C)
  • 5b (to -10 F / -23 C)
  • 6a (to -5 F / -21 C)
  • 6b (to 0 F / -18 C)
  • 7a (to 5 F / -15 C)
  • 7b (to 10 F / -12 C)
  • 8a (to 15 F / -9 C)
  • 8b (to 20 F / -7 C)
Height (Maximum) edit
  • 2 to 5 feet (60 cm to 1 1/2 m)
Spread (Maximum) edit
  • 2 to 5 feet (60 cm to 1 1/2 m)
Flowering Start edit
  • July
Flowering End edit
  • August
Leaf Colour edit
  • Green - Medium
Leaf Shape edit
  • Lanceolate
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Suitable For edit
  • Border/Bed
  • Cottage Garden
  • Low Maintenance Garden
Sun Exposure edit
  • Full Sun
  • Partial Shade
Soil Types edit
  • Well-drained
  • Moist
  • Loamy / Medium
Soil pH edit
  • 6.5 - 6.9 (Very slightly acidic)
  • 7.0 (Neutral)
  • 7.1 - 7.5 (Very slightly alkaline)
Bloom Colour edit
  • Yellow/Gold
Wildlife Value edit
  • Bees
  • Butterflies (nectar source)
Propagation Techniques edit
  • Seed
  • Division
Skill Level edit
  • Beginner
Additional Short Notes add
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  Hosta 'Abiqua Drinking Gourd'
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  Ligularia stenocephala (Ligularia)
  Ligularia dentata (Golden Groundsel, Summer Ragwort)


Contributors For This Plant
Droopy (10087)
Frank (2698)
Kiasmum (123)


Gardens Containing This Plant
Droopy's Garden


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Images for this Plant


Photo of Centaurea macrocephala (Yellow Hardhead, Giant Knapweed)
Centaurea macrocephala (Yellow Hardhead, Giant Knapweed)
photo / image / picture
Uploaded
Nov 04 2012
by Kiasmum (123)
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1 person likes this image
This image is copyright of member Kiasmum (123).
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Photo of Centaurea macrocephala (Yellow Hardhead, Giant Knapweed)
Centaurea macrocephala (Yellow Hardhead, Giant Knapweed)
photo / image / picture
Uploaded
Aug 16 2008
by Droopy (10087)
I like this image
2 people like this image
This image is copyright of member Droopy (10087).
You must contact this member if you have a usage request.










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