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The long purple-black flower spikes of Black Knight butterfly bush

Buddleia 'Black Knight' - Butterfly Bush

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A garden classic since 1959, ‘Black Knight’ butterfly bush boasts some of the most dramatically colored flowers you’ll find in a butterfly bush. They aren’t quite black, but they are an intriguing deep purple-blue that few other plants can match. This butterfly bush looks fantastic paired with bright pinks, crisp whites, and cheery yellows. Deadheading is recommended for this old-fashioned variety to encourage continued flower production.

‘Black Knight’ received the prestigious Award of Garden Merit from the Royal Horticultural Society (RHS) in 1993.

Vital details:

Plant size: 4-6'/1.2-1.8m tall and wide

Light: full sun (6+ hrs/day)

Hardiness: USDA zone 5-9 (Find your hardiness zone)

Pollinator value: attracts butterflies of all types, as well as other pollinating insects

Notable features: fragrant, deer resistant, long-blooming, drought tolerant.

Pot size: one quart

Plant name: Buddleia davidii ‘Black Knight’