Buddleja davidii 'Black Knight' | Butterfly Bush
The darkest-flowered buddleja!
Grown by Cameron
Roots' Cotswolds Valley Nursery
Plant in a 3L Pot
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Plant diary
- Flower
- Harvest
Buddleja davidii 'Black Knight'
Butterfly Bush
- A large, vigorous, deciduous shrub with a bushy habit
- Dark purple panicles of scented flowers on arching branches, amongst lance-shaped grey-green leaves
- Plant in a sunny border and watch the butterflies flock to your garden
- Grows to around 5m x 3m
- A fully hardy, low maintenance perennial plant
- Fast growing and drought resistant once established
- Winner of the RHS Award of Garden Merit and Plants for Pollinators designation
What to expect
Supplied as
Flower colour
Habit
Hardiness
Spacing
Will this grow in my garden?
Can I grow this in a pot?
Yes, Buddleja davidii 'Black Knight' can be grown in a pot, provided you use a suitably sized container with good drainage.
How big does it get?
The Buddleja davidii 'Black Knight' typically reaches a mature height of 3 to 4 metres and a spread of 2 to 3 metres.
How much sunlight does this need?
The Buddleja davidii 'Black Knight' thrives in full sun, requiring at least 6 to 8 hours of direct sunlight daily for optimal growth.
What kind of soil does this plant prefer?
Buddleja davidii 'Black Knight' prefers well-drained soil of any type.
How much watering does this plant need?
The Buddleja davidii 'Black Knight' requires moderate watering, needing about 2.5 centimetres of water per week during dry spells.
Will this plant need pruning?
Yes, the Buddleja davidii 'Black Knight' requires pruning to maintain its shape and encourage healthy growth. You can safely cut back up to 30 centimetres of growth during the dormant season, typically when temperatures drop below 10 degrees Celsius.
How hardy is this plant?
The Butterfly Bush is fully hardy across the UK with an RHS rating of H6, withstanding temperatures down to -20°C.
The wider garden
Roots' Cotswolds Valley Nursery
Meet Cameron
Putting shrubs in the starlight (and boy do they shine…)
Cameron is mad about plants, which is lucky, really, because he’s absolutely surrounded by them here at the nursery. Having studied at the Student Plant Unit at Pershore College, Cameron went on to compete at the Grand Finals for the 2022 Horticulturist of the Year Awards. With a team of dedicated growers on hand to help, Cameron utilises our industry-leading nursery (and the lovely, fertile conditions of the Cotswolds) to grow shrubs that aren’t just good-looking, they’re good-growing too.
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