General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 10b
Plant Height: 3.5 - 4 feet
Plant Spread: 6 - 6.5 feet
Leaves: Fragrant
Flowers: Showy
Fragrant
Blooms on new wood
Other: 10 inches long flower spikes
Flower Color: Blue
Other: Opens light lavender-purple and deepens to blue-purple as it ages
Flower Time: Late summer or early fall
Other: Deadheading flowers ensures more flowering throughout the season.
Uses: Windbreak or Hedge
Cut Flower
Wildlife Attractant: Bees
Butterflies
Hummingbirds
Resistances: Deer Resistant
Rabbit Resistant
Drought tolerant
Miscellaneous: Patent/Plant Breeders' Rights: PP28178

Image
Trade name information:
Series: Monarch®
Trade Name: Blue Knight
Cultivar name: 'Blue Knight'
Common names
  • Butterfly Bush
Also sold as:
  • Buddleia
  • Buddlea

Photo Gallery

Photo courtesy of Harris Seeds
  • Uploaded by Joy

Image Courtesy of Bloomin Designs Nursery Used with Permission
  • Uploaded by Joy

Image Courtesy of Bloomin Designs Nursery Used with Permission
  • Uploaded by Joy

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