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Buddleja davidii 'Black Knight' (Butterfly bush 'Black Knight')
2 hours care
per year
per year
4m
Max height
Max height
4m
Max spread
Max spread
5-10 years
To maturity
To maturity
Plant details
Botanical name
Buddleja davidii 'Black Knight'
Other names
Butterfly bush 'Black Knight', Buddleia 'Black Knight', Buddlea 'Black Knight'
Genus
Buddleja Buddleja
Variety or Cultivar
'Black Knight' _ 'Black Knight' is a fast growing large deciduous shrub with arching branches and lance-shaped leaves, and panicles of deep-purple scented flowers.
Buddleia are nectar rich plants, which encourage benefical wildlife, such as ladybirds, lacewings and hoverflies into the garden
Buddleja davidii 'Black Knight' is: Deciduous
Fragrance
The flowers are sweetly fragrant.
Habit
Arching, Branching, Bushy, Irregular
Awards
RHS AGM (Award of Garden Merit)
Flower
Dark-purple in Summer; Dark-purple in Autumn
Foliage
Grey-green, White in Summer
How to care
Watch out for
Specific pests
Capsid bug , Aphids , Caterpillars , Glasshouse red spider mite , Leaf and bud eelworms Capsid bug , Aphids , Caterpillars , Glasshouse red spider mite , Leaf and bud eelworms
Mosaic virus Mosaic virus
General care
Pruning
The panicles turn brown, so deadhead as they fade to improve appearance.
Propagation methods
Semi-hardwood cuttings
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Where to grow
Buddleja davidii 'Black Knight' (Butterfly bush 'Black Knight') will reach a height of 4m and a spread of 4m after 5-10 years.
Suggested uses
Cottage/Informal, Drought Tolerant, Beds and borders, Low Maintenance, Resistant to pollution, Wildflower, Instant
Cultivation
Tolerates many situations, but grows best in a sunny, well-drained situation.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
Plant with other fast-growing plants for an instant garden
Botanical name
Buddleja davidii 'Black Knight'
Other names
Butterfly bush 'Black Knight', Buddleia 'Black Knight', Buddlea 'Black Knight'
Genus
Buddleja Buddleja
Variety or Cultivar
'Black Knight' _ 'Black Knight' is a fast growing large deciduous shrub with arching branches and lance-shaped leaves, and panicles of deep-purple scented flowers.
Buddleia are nectar rich plants, which encourage benefical wildlife, such as ladybirds, lacewings and hoverflies into the garden
Foliage
Deciduous
Fragrance
The flowers are sweetly fragrant.
Habit
Arching, Branching, Bushy, Irregular
Awards
RHS AGM (Award of Garden Merit)
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Colour
Flower
Dark-purple in Summer; Dark-purple in Autumn
Foliage
Grey-green, White in Summer
How to care
Watch out for
Specific pests
Capsid bug , Aphids , Caterpillars , Glasshouse red spider mite , Leaf and bud eelworms
Specific diseases
General care
Pruning
The panicles turn brown, so deadhead as they fade to improve appearance.
Propagation methods
Semi-hardwood cuttings
Monthly care advice
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Where to grow
Buddleja davidii 'Black Knight' (Butterfly bush 'Black Knight') will reach a height of 4m and a spread of 4m after 5-10 years.
Suggested uses
Cottage/Informal, Drought Tolerant, Beds and borders, Low Maintenance, Resistant to pollution, Wildflower, Instant
Cultivation
Tolerates many situations, but grows best in a sunny, well-drained situation.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 9, Zone 8, Zone 7, Zone 6
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24/2/18
This Shrub was planted (bare root) on the 31 of March 2012 (20/09/2012)
| This plant likes... | Garden match | |
| Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
| Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Partial Shade, Full Sun | Tell us... |
| Aspect: | South, East, West | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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DISCUSS THIS PLANT
This year the panicles were the third of the size as last year's. Did I prune incorrectly. Would be grateful for advice as last year they looked spectacular. Thank you. Lou
There is 1 active discussion about Buddleja davidii 'Black Knight' (Butterfly bush 'Black Knight')
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