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Buddleja davidii 'Black Knight' (Butterfly bush 'Black Knight')

Beginner
skill rating
2 hours care
per year
4m
Max height
4m
Max spread
5-10 years
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

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)


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

Mosaic virus

General care

Pruning

The panicles turn brown, so deadhead as they fade to improve appearance.

Propagation methods

Semi-hardwood cuttings


Monthly care advice


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)

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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...

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

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 read more

There is 1 active discussion about Buddleja davidii 'Black Knight' (Butterfly bush 'Black Knight')

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