Butterfly bush

Buddleja davidii 'Black Knight'

Butterfly bush - Buddleja davidii  'Black Knight'

Common Name: Butterfly bush
Genus: Buddleja
Species: davidii
Cultivar: 'Black Knight'

Category: Shrubs and Sub-shrubs
Growth Rate: Fast growing
Features: Has fragrant flowers/foliage, Good for wildlife, Has colourful autumn foliage, Long flowering period

Hardiness: HardyHeight: 3.00 m (300 cm)
Sun/Shade: Full sunSpread: 5.00 m (500 cm)

Foliage Type: DeciduousFlower Colour: Purple
Foliage Colour: Green, Grey/Silver, YellowFlowering Period: July to September

Soil Type: Normal/Loam or Sandy/Light or Chalky/Alkaline
Soil Moisture: Dry, well drained or Moist, but well drained

Much maligned for its habit of colonising railway sidings buddleja can be a fabulous addition to a sunny border with dramatic fragrant flowers that are attractive to butterflies and other beneficial insects. Pruned hard in spring 'Black Knight' produces dense spikes of tiny fragrant dark purple flowers. In autumn the pointed grey-green leaves turn butter-yellow.

  • Garden care: Prune back hard in March removing all of the previous year's growth to three or four buds.


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