Plant Type: Deciduous flowering shrub
Botanical Name: Buddleja davidii ‘Black Knight’
Flower Colour: Dark purple to black-violet
Growth Habit: Vigorous, upright shrub
Final Height: Approx. 2–3 m
Exposure: Full sun
Soil Type: Well-drained soil
Flowering Period: Mid summer to early autumn
Hardiness: Suitable for outdoor growing once established

Butterfly Bush ‘Black Knight’ is one of the most dramatic and richly coloured varieties available, valued for its deep blooms and strong garden presence. Buddleja davidii is widely known for attracting butterflies, bees, and other beneficial insects throughout the summer season.

This variety produces long, dense panicles of intense dark purple to black-violet flowers. Flowering is generous from mid summer into early autumn, adding depth and contrast to borders while filling the garden with movement and pollinator activity.

‘Black Knight’ grows as a vigorous deciduous shrub, gradually reaching approximately 2 to 3 metres in height. It performs well as a focal point in mixed planting schemes, as part of a flowering hedge, or wherever bold summer colour is desired.

For best results, plant in full sun in well-drained soil. Butterfly bushes thrive in warm, open positions and are generally easy to cultivate once established, offering dependable blooms year after year.

This shrub flowers on new growth, so pruning back firmly in early spring encourages strong fresh stems and abundant flowering during the growing season.

For gardeners seeking the deepest summer colour combined with strong pollinator attraction, ‘Black Knight’ remains an outstanding and reliable choice.