Black Knight Butterfly Bush (Tree Form)
Buddleia davidii 'Black Knight'
Dark purple flower spikes attract butterflies
Tree form adds vertical interest to gardens
Blooms from summer to fall with minimal care
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Heavy-Blooming and Dramatic Purple Flowers
The Black Knight Butterfly Bush in Tree Form has some of the most intensely purple and prolific flowers that grow in spikes. This tree has dark green foliage and an arching, spreading habit that makes it perfect for borders, beds, and as a privacy screen.
The name doesn’t disappoint, as this plant is a magnet for butterflies and other pollinators. It emits a strong honey-scented fragrance that they just can’t resist and find the flowers rich in nectar. This plant blooms all summer long, giving you a beautiful display of not only flowers but visiting butterflies.
‘Black Knight’ is a pest-resistant variety that is also deer and rabbit-resistant. Butterfly bushes are known for being very easy to grow, needing very little maintenance. This variety is cold hardy, growing in temperatures as low as Zone 4.
Add this RHS award-winning shrub to your garden and order online today!
Full Planting & Care Instructions
Product Details
| Mature Height: | 5-10 ft. |
| Mature Width: | 4-6 ft. |
| Sunlight: | Full Sun |
| Bloom Season(s): | Summer Blooming, Fall Blooming |
| Growth Rate: | Fast Growing |
| Botanical Name: | Buddleia davidii 'Black Knight' |
| Does Not Ship To: | AK, AZ, HI, OR, WA |
| Grows Well In Zones: | 5-9 outdoors |
Growing Zones: 5-9 outdoors
(hardy down to -10℉)
Customer Reviews & Photos
Based on 18 reviews
Beautiful Butterfly
I ordered 2 Black Knight Butterfly bushes. They arrived healthy and I planted them immediately. They already had a few flowers and they continued to have more. I look forward to next spring when they’ll grow more.
Black Knight Butterfly Bush (Tree Form)
Very pretty and healthy upon arrival. Doing well after planting.
Monarch Visited my Tree
Here's the Monarch that landed on my Butterfly bush tree form
Lovely and easy to grow
Arrived healthy. 3 are 2 months old and 2 are about a month old. I really love them. I hope they get 10 ft tall. I had a monarch Butterfly soaking up nectar yesterday. Easy to grow unless they are in soggy soil, but they do not like to get dried out. I usually do a 30 min soaker, and wait 2 hours and use the house to get the dry parts for about 5 sec. Anyway just gorgeous 😍
Very happy
I ordered 2 Black Knight Butterfly Bush trees. They arrived today August 9, 2025. They are in perfect condition! They look absolutely amazing and I am so excited to watch them grow. I am always amazed by Fast Growing Trees. They have an amazing selection of trees, shrubs and flowers. I am never disappointed.
