Buddleja davidii 'Black Knight'
butterfly bush 'Black Knight'
A vigorous large deciduous shrub to 3m, with somewhat arching growth and lance-shaped leaves, whitish beneath. Flowers scented, deep purple, in elongated panicles at tips of current year's growth
Size
Ultimate height
2.5–4 metresTime to ultimate height
5–10 yearsUltimate spread
2.5–4 metresGrowing conditions
Moisture
Moist but well–drained, Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green White | |||
|---|---|---|---|---|
| Summer | Purple | Green White | ||
| Autumn | Purple | Green White | ||
| Winter |
Position
- Full sun
- Partial shade
Aspect
South–facing or East–facing or West–facing
Exposure
Exposed or ShelteredDrought resistance
Yes Hardiness
H6Botanical details
- Family
- Scrophulariaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Bushy
- Genus
Buddleja can be evergreen or deciduous shrubs, occasionally trees or scrambling climbers with simple leaves and panicles of small, tubular fragrant flowers
- Name status
Accepted
How to grow
Cultivation
Buddleja perform best when grown in a sunny, well-drained situation. See buddleja cultivation for more detailed advice
Propagation
Propagate by semi-hardwood cuttings
Suggested planting locations and garden types
- Cottage and informal garden
- Wildlife gardens
- Low Maintenance
- Flower borders and beds
Pruning
Pests
May be susceptible to aphids, capsid bugs, caterpillars, earwigs, figwort weevils, glasshouse red spider mite, leaf and bud eelworm, and mullein moth
Diseases
May be susceptible to honey fungus, fungal leaf spot, and virus diseases
Get involved
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