Buddleia Black Knight

Attract butterflies with fragrant, nearly black-purple flower spikes and bold summer color. Black Knight Butterfly Bush develops an arching, spreading habit with grey-green foliage and long clusters of deep purple flowers. Regular deadheading can encourage bloom production from summer until frost.

Growing Guide

  • Sun Exposure: Full Sun
  • USDA Hardiness Zones: 5 - 9
  • Mature Height: 6 feet–8 feet
  • Mature Width: 3 feet–5 feet
  • Spacing: 4 feet
  • Soil: Average, well-drained soil
  • Water Needs: Moderate
  • Growth Rate: Moderate

Plant Details

  • Botanical Name: Buddleia davidii 'Black Knight'
  • Common Name: Black Knight Butterfly Bush
  • Plant Type: Shrub
  • Bloom Color: Purple
  • Season of Interest: Summer , Fall
  • Foliage: Deciduous
  • Growth Habit: Spreading and arching
  • Pollinator Friendly: Yes

Key Features

  • Deep purple flowers
  • Spreading and arching growth habit
  • Low-maintenance once established
  • Fragrant flowers attract butterflies and pollinators
  • Long summer-to-fall bloom period
  • Performs best in sunny, well-drained sites

Landscape Uses

  • Pollinator gardens
  • Mixed borders
  • Accent plantings
  • Cottage gardens
  • Mass plantings

Planting & Care Tips

  • Plant in well-drained soil.
  • Water regularly during the first growing season.
  • Plant in full sun for the best flowering.
  • Prune in late winter or early spring and remove spent blooms as desired.

Companion Plants

  • Liriope muscari 'Big Blue'
  • Panicum virgatum 'Shenandoah'
  • Salvia
  • Coreopsis

Please Note: Our photos represent the variety you will receive. Because plants are living products, size and fullness may vary naturally with the season and stage of growth, while remaining true to the variety shown.

$61.75
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Shipping calculated at checkout.
  • In stock, ready to ship
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Size
Plant Size at Shipment: (12" x 12")
  • Georgia Grown
  • High Quality Guarantee

All plants are shipped through UPS ground services.  

Estimated Shipping Time: Your order may ship immediately, however most orders ship in 1-2 business days (we do not ship on weekends) from date of purchase. Once your order is shipped, you'll receive an email with a tracking number.

If you ordered more than one plant, you will receive multiple shipments. This is to get your plants to you as soon as possible. However, shipping schedules can change due to unforeseen events, such as unpredictable weather. We appreciate your patience.

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Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden
Black Knight Butterfly Bush growing in a landscaped garden

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