Skip to main content
A picture of a Buddleja 'Black Knight'

Buddleja 'Black Knight'

Buddleja davidii 'Black Knight'

Also known as

Butterfly Bush 'Black Knight', Buddleia 'Black Knight'

Buddleja davidii 'Black Knight' 2 by Ptelea (CC BY-SA 3.0)

Full Sun
Moderate care
Light watering
Frost Hardy


RHS hardiness


Minimum temperature

Expected size








10 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

More images of Buddleja 'Black Knight'

A close up of some purple flowers on a Buddleja davidii 'Black Knight' plant
A photo of Buddleja 'Black Knight'

Buddleja 'Black Knight' Overview

Buddleja davidii 'Black Knight' is a vigorous, deciduous, bushy shrub bearing long, lance-shaped, dark green leaves with white felted undersides. In mid-summer to autumn, dense clusters of fragrant, tubular, dark purple flowers with tiny orange centres are produced on elongated, arching growth from the current year. A low maintenance, fast-growing plant that is particularly popular with butterflies, Buddleja davidii 'Black Knight' is often seen in cottage, wildlife and other informal gardens. A very tolerant plant, it prefers well-drained soil and is drought resistant. Deadhead regularly to encourage new flowers. 'Black Knight' has earned a coveted 'RHS Award of Garden Merit' and is on the RHS 'Plants for Pollinators' list highlighting plants that produce large amounts of nectar and/or pollen. A great choice for encouraging beneficial insect wildlife into your garden!

Common problems with Buddleja 'Black Knight'

How to propagate Buddleja 'Black Knight'


Propagate from semi-ripe cuttings in early summer. Root the hardwood cuttings in autumn.

Special features of Buddleja 'Black Knight'

Attractive flowers

Attracts bees

Attracts butterflies

Autumn colour

Drought resistant


About usCareersPrivacy policy

Candide is your guide to visiting UK public gardens. Find the best gardens, buy tickets and enter with just your phone. Download the app for offline tickets, community access and more.

Terms & ConditionsCode of Conduct

© 2022 Candide

Made in Bristol