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
Order now to unlock an extra 25% OFF with PLANT25
-
- FREE Shipping on orders over $99
- Restocking soon
Select size
This week only—25% off EVERYTHING!
Add this item to cart and get 25% OFF on your order with code PLANT25
| Discount level | Cart total |
|---|---|
25% OFF | No minimum |
| 30% OFF | $600 or more |
| Sale ends 9/1 at 11:59PM | |
Pay in 4 interest-free installments of $23.73 with 
Learn more
Customers Also Viewed
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: | AZ, OR, WA |
| Grows Well In Zones: | 5-9 outdoors |
Growing Zones: 5-9 outdoors
(hardy down to -10℉)
Customer Reviews & Photos
Based on 16 reviews
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.
Night Black Butterfly Bush tree form
Order was quick and easy as always. The tree shipped extremely fast. I have not personally seen the tree it was a gift for a friend. They are very happy and are in love with the tree. I am very happy with Fast Growing Trees and all of my planting business will always be done here. Thank you!!!!
Love it!
The tree arrived in great condition. I planted it on 7/5/25 and it is now 7/30/25 and it looks great and is blooming like crazy already!
