Plant Calculator
Enter the approximate length and width of the area you will be planting and click 'Calculate' to determine how many Buddleia davidii 'Black Knight' you will need.
*Correct and successful spacing is complex and depends on project conditions.
Buddleia davidii 'Black Knight'
Butterfly Bush 'Black Knight'
- Accent Plant
- Butterfly Bush
- Mass Plantings
- Category: Trees & Shrubs, Discontinued
- Hardiness Zone: 7b
- Height: 6-8 Feet
- Spread: 3-5 Feet
- Bloom Color: Purple
Deciduous shrub best grown in full sun and in well-drained soils. Can grow in shade, however will develop a weed-like habit. Regular pruning will benefit the growth habit and promote better blooms. Mulch throughout the winter to prevent death from freezing temperatures.
Fragrant flower spikes can be up to 10 inches long, and do well when cut and used in floral arrangments. They begin to appear in the early spring and continue through fall. "Black Knight" cultivar has very dark purple blooms, nearly a shade of black.