Alert: Limited Online Availability

Now that fall is here, we have limited our stock for online purchase. Find Monrovia plants at your local garden center. Pre-order for 2023 will be available later this year. ×

Black Knight Butterfly Bush

Buddleja davidii 'Black Knight'

SKU
01378
Spectacular summer color from lightly fragrant, dark violet-purple flower spikes. A fast growing shrub that works well as a foundation shrub, an accent plant or as a background in borders. Slightly hardier than other varieties, but may die to ground in cold winter areas, emerging vigorously in spring. Deciduous.
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5-9

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Full sun, Partial sun

Water when top 3 inches of soil is dry.

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Botanical PronunciationBUD-lee-uh da-VID-ee-eye
Average Size at MaturityQuickly reaches 6 to 8 ft. tall, 4 to 6 ft. wide.
Bloom TimeMidsummer through Fall
Deciduous/ EvergreenDeciduous
Flower AttributeFlowers for Cutting, Fragrant, Showy Flowers
Flower ColorPurple
Foliage ColorGray-green
Garden StyleCottage, Mediterranean, Rustic
Growth HabitVase-Shaped
Growth RateFast
Landscape UseBorder, Container
Light NeedsFull sun, Partial sun
Special FeatureEasy Care, Waterwise, Fast Growing
Water NeedsModerate
Watering NeedsWater when top 3 inches of soil is dry.
Companion PlantsBee Balm (Monarda); Coneflower (Echinacea); Butterfly Weed (Asclepias); Salvia (Salvia); Russian Sage (Perovskia)

Prefers well-drained, fertile soil. Water deeply, regularly during first growing season to establish extensive root system; reduce frequency once established. Clip spent flowers to promote continued bloom. May die to the ground in colder zones, regrowing from the roots in spring. Elsewhere, prune in late fall or early spring. Feed in spring.

This Plant's Growing Zones: 5-9

USDA Cold Hardiness Zone Map

Your USDA Cold Hardiness Zone:

Your climate may be too cold for this plant