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  • Black Knight Butterfly Bush for Sale

    Black Knight Butterfly Bush for Sale

*images shown are of mature plants

Black Knight Butterfly Bush

Buddleia 'Black Knight'

$49.95 (25% Off)

1. Size

  • Ships Friday, Jan 25
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2. Quantity

3. Extras

-t- Root Rocket™ Fertilizer
Root Rocket™ Transplant Fertilizer

2oz. Packet

Get your new plants off to the right start by using Root Rocket™ Transplant.

This soil amendment contains 16 strains of mycorrhizal fungi, biostimulants, beneficial bacteria and Horta-Sorb® water management gel.

Simply sprinkle the product into the planting hole adjacent to the root ball when planting.

The organisms will start to work right away supplying the roots with much needed nutrition.

The specially formulated Horta-Sorb® will reduce transplant stress and aid in water retention.

1 packet per plant

Root Rocket Fertilizer
-t- Planting Mix
Black Knight Butterfly Bush Planting Mix

Helps your Black Knight Butterfly Bush get established in a fraction of the time, become more drought tolerant, and grow faster. Here's how:

Beneficial Bacteria... It's like a Probiotic for your tree... creating an explosion of fine hair roots that vastly improves nutrient and water uptake.

Coarse Organic Compost... loosens and improves all types of soils while promoting proper pH levels. You get better drainage and moisture retention.

Microbial Fertilizers... including Sea Kelp, Yucca, and 100 other elements proven to gently feed your tree without burning the roots.

Use 1 bag of Planting Mix for each plant ordered.

Soil Contents
-t- TreeGator® Jr. Watering Bag
TreeGator® Jr.

When you’re making an investment and effort in planting new trees in your landscape, you can assure their survival and growth by using TreeGator® - a truly simple and innovative drip irrigation system in a bag.

With hot summers and droughts the norm around the USA, TreeGator® is an absolute necessity to protect your new trees and shrubs.

TreeGator® is super easy to install without any tools, and it can easily be filled up with a standard garden hose or can even be connected to a rain barrel!

It's a super time saver that takes the worry out continually remembering whether you've watered your new tree or not. Plus, all the water that goes into the drip bag is used up with no waste, so TreeGator® is environmentally friendly with regard to water use.

Tree Gator

Growing Zones: 5-9
(hardy down to -10℉)

Growing Zones 5-9
You are in Growing Zone: 7

Mature Height:

4-6 ft.

Mature Width:

4-6 ft.


Full Sun

Growth Rate:


Botanical Name:

Buddleia 'Black Knight'

Does Not Ship To:


The Butterfly and Hummingbird Feeder You'll Never Have to Refill

- Attracts butterflies like no other plant
- Drought tolerant
- Long blooming period

Your morning coffee time will never be the same!

Bright, fragrant blooms draw in hoards of butterflies and hummingbirds.

Plant the butterfly bush in groupings or in rows for a summer long spectacular show.

Butterfly Bush works in the perennial garden and as an accent plant.

This deciduous shrub highlights any garden. The large, elongated clusters of blooms provide ample nectar for all varieties of butterflies and hummingbirds.

In the heat of the summer, this star shines. A profusion of flowers from mid-July until the first frost reward you month after month with uninterrupted blooming.

Your well developed 3 gallon container plant will reach its mature height of 4-6 ft. the first year.

This Butterfly Bush is highly adaptable and will tolerate most growing conditions, including clay and sandy soils. It's a drought tolerant plant that requires little water once established.

Your Butterfly Bush will give you year after year of enjoyment.

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Customer Reviews

4.1 / 5.0
46 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great addition!
I ordered these for my hummingbird/ Butterfly landscape/garden. I planted as soon as they arrived. They have already started showing signs of new growth. Can not what till spring to see all the blooms. I will be ordering more. Great addition
December 23, 2018
2 months ago
Growing Zone:
Died the next year
I thought these would do really well but then in the spring of the following year they all died, Do not know why because they really took off very disappointed
August 12, 2018
over 3 years ago
Growing Zone:
Did not survive
Unprecedented heat in Central Texas did not allow this poor thing to survive. I had it cared for by a nursery -- not a big box store. RIP, little bush
August 6, 2018
7 months ago
Black Knight Butterfly Bush
Arrived quickly and was packaged extremely well. Was as described, approximately 2 foot in height and nice branching shape. Has been planted about 2 weeks and is growing nicely.
Has bloomed with continuous blooms to follow. Blooms are
deep dark purple and beautiful. Thank you so much!
June 23, 2018
7 months ago
Growing Zone:
Not a good choice
Bush did not survive the winter in western Colorado. I see these bushes all over Grand Junction so I guess I need to purchase them here where they are cultivated.
June 23, 2018
1 year ago
Growing Zone:
Great looking bush, requires a bit more attention that I have been giving it lately. Likes a good daily watering and in Southwest Florida, that usually happens. Blooms quickly when it gets its needed attention, however the blooms die off very quickly when it is feeling neglected. Would recommend with the caveat of, make sure you or your landscaper will give it the attention it needs, has not been a plant and forget bush.
June 17, 2018
11 months ago
Growing Zone:
Just what I wanted
June 13, 2018
8 months ago
Growing Zone:
Very pretty flowers, fast growing, vigorous, taking over the yard1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
June 12, 2018
8 months ago
nice butterfly bush
The butterfly bush is really small. It does have 2 blooms on it already though. A lot smaller bush than I anticipated but it is living so probably will grow soon. I would recommend it but do not expect a larger plant.
June 7, 2018
8 months ago
Growing Zone:
Unfortunately all the blooms had passed when it arrived. Will have to wait for the new growth to see it.
June 5, 2018
8 months ago

Planting & Care

It's Easy to Plant & Care for Your Black Knight Butterfly Bush

Black Knight Butterfly Bush Planting Diretions

The Black Knight Butterfly Bush (Buddleia 'Black Knight’) is a gorgeous deep purple shrub that blooms from early summer until autumn. These amazing plants are adored by hummingbirds and butterflies and make wonderful additions to your landscape. They reach a height/width of 4-6 feet and are recommended for USDA growing zones 5-9. Butterfly bushes will thrive to the best of their potential in a full sunlight area.

Choosing a location: Select a location that receives ample sunlight, full sun will be best. These plants prefer 6+ hours of direct sunlight daily. Although preferring full sunlight, they can still do well in a partially shaded spot. This still means they would still need at least 2-4 hours of direct morning sunlight and they can tolerate afternoon shade.

Planting directions:
1) After choosing your area, dig a hole that is twice as wide and just as deep as the container that the plant arrives in.
2) Carefully remove the plant from the container. Lightly tapping around the base will help to loosen the root ball if it is difficult to remove.
3) Lightly comb the ball with your fingers to loosen the roots so that they spread out more quickly.
4) Place your plant in the hole so that the top of the soil is even with the surrounding soil level.
5) Backfill with a mixture of native soil and compost. These plants like rich soil so you can use a 50/50 mixture of compost and native soil to add additional nutrients.
6) Water after every few inches to settle the soil and remove any air pockets that may have formed. Tamp the soil well when done.
7) Water well when done and cover the area with mulch to protect the roots and help them conserve moisture. Be sure the mulch is not touching the tree or rot and fungus may set in.

Watering: Ensure the area has well draining soil, drainage is essential. Once planted, to help the soil stay moist around these plants, you will need to water your Butterfly Bush deeply and mulch to conserve soil moisture. The soil must be moist at least 6-8 inches deep. Once watered, allow the soil to dry out before watering again.

Pruning: These plants can be pruned annually. You can remove spent blooms on the plant to encourage more blooms to come out on the bush. Butterfly Bushes can also be pruned to not only shape them, but to encourage more aggressive new growth. You can prune them towards the ground to accomplish this. It can be done during the plant's dormancy period either in late fall to early winter or during the spring.

Fertilization: Butterfly Bushes rarely need fertilizer unless you are dealing with poor soil conditions. If that is the case, you can uses a slow release fertilizer for your plants. Follow the instructions on the package of your fertilizer and be certain to water deeply afterwards. Be cautious of high nitrogen fertilizers that will encourage more foliage but less blooms.

Pests: Butterfly Bushes for the most part are not bothered by pests. However, they can have issues with Spider Mites and caterpillars from time to time. Both insects are easily treatable with insecticidal soap. If they remain on the plant you can use something stronger like Neem Oil or Bacillus thuringiensis.

Planting & Care

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 21 questions Browse 21 questions and 88 answers
Why did you choose this? Store
I purchased one about an year ago. It's grown to twice the original size and the butterflies love it. I had to get one to go right next to it.
John J on Jan 16, 2019
love butterflies and humming birds.
need the sedum tiles to place on my sister's plot.

love to have a fragrant plant on my patio ….will try the fragrant tree olive
maria c on Sep 8, 2018
I purchased one about an year ago. It's grown to twice the original size and the butterflies love it. I had to get one to go right next to it.
John J on Jan 16, 2019
These bushes will be the started of my butterfly garden
Hotgrits40 on Dec 28, 2018
love butterflies and humming birds.
need the sedum tiles to place on my sister's plot.

love to have a fragrant plant on my patio ….will try the fragrant tree olive
maria c on Sep 8, 2018
My mother's best friend passed away and she loved butterflies.
Linda L on Aug 28, 2018
For a butterfly garden
lori s on Aug 26, 2018
Very cool to see the butterflies and hummingbirds on them .
michael m on Aug 16, 2018
We are turning a large piece of our front lawn into a butterfly garden. Hoping to add color and attract butterfly, hummingbird and bee activity. Plus less mowing!
virginia t on Jun 10, 2018
I'm trying to attract more hummingbirds and butterflys
William V on Jun 5, 2018
Because I had one last year that didn't survive the winter
Lorenzo D on May 29, 2018
For the butterflies & Hummingbirds
Armanda E on May 21, 2018
They lost their 21 year old son suddenly.Hoping this plant will remind them of Ian every time they see butterflies land on bush.
The H on May 16, 2018
Love to have butterflies around - so if there more Bushes to attract other butterflies I would love to know
Holly D on May 16, 2018
I love to watch butterflies that are attracted to its beautiful blooms.
Edith L on May 11, 2018
I have some that did not make it thru the winter and needed to replace them.
DIANNE B on May 11, 2018
to attract Butterfly's
Susan Morris M on May 9, 2018
Had one before flood they are beautiful and call a lot butterflies to them.
vickie f on May 5, 2018
butterfly attraction
Adelina R on Apr 1, 2018
Attract butterflies to my butterfly garden.
John B on Mar 20, 2018
I love butterfly's so it must be a beautiful shrub.
Verlene B on Feb 19, 2018
I love butterfly bushes and so do the butterflies and hummingbirds, both of which I enjoy watching.
Tiffanie M on Feb 19, 2018
This was ordered as a memorial gift for Lisa's parents by her co-workers.
Lisa M on Feb 6, 2018
Hoping to draw butterflies to a perennial garden.
tina m s on Feb 5, 2018
Color and aroma and attraction of butterflies
Joey O on Jan 2, 2018
LOVE butterflies
tommie d on Oct 26, 2017
I love butterflies and wanted a purple color in my back yard
Kimberly L on Sep 25, 2017
Love to help the butterflies, and I've always had good luck with them.
Gale H on Sep 11, 2017
This one is in memory of my sister. She had one and loved the fact that it draws so many butterflies..
John J on Aug 10, 2017
These plants bring butterflies around all the time
Amy M on Jul 7, 2017
Beautiful on the edge of the flower beds
James H on Jul 5, 2017
Divine Inspiration
Takysha M on Jun 20, 2017
pretty accent central piece in the front garden
AMY H on Jun 12, 2017
Love all of the beautiful and the variety of the butterflies!!!
James E. M on Jun 5, 2017
I'm hoping to attract more butterflies and hummingbirds. A friend of mine has a tri colored bush.
susan r on Jun 5, 2017
to see if it actually attracts butterflies and humming birds, and it looks beautiful
Nathan B on May 18, 2017
love the way the butterflies flock to these bushes and the long flowering period through summer.
Deborah S on May 15, 2017
Planting a butterfly garden
Kassandra S on May 5, 2017
We have one in our yard and just love it. It constantly has butterflies on it when it's blooming. So pretty. Would highly recommend.
Linsay S on May 3, 2017
We would like to see butterflies here.
Tammy B on May 2, 2017
Sympathy gift.
Meridith H on May 2, 2017
I love the colorful blooms and would love to see some butterflies..
Paula M on Apr 30, 2017
Very hardy and a wonderful compliment to the garden. It attract butterflies, bees and hummingbirds.
Charlee C on Apr 30, 2017
Love butterflies in a garden.
Peter F on Apr 28, 2017
I chose this butterfly bush to go in the center of a hummingbird garden between arches of climbing Jasmin and honeysuckle.
Stacey J on Apr 22, 2017
Like the color and how fast it grows and that it attracts butterflies.
Colleen F on Apr 21, 2017
We love butterflies in our yard and anything that helps attract them is good for us
Joan O on Apr 13, 2017
I love my butterfly plant, I. bought the bush last yr. plant doing very well with lots od butterflys hanging around.
Mary Gene M on Apr 1, 2017
Beautiful and gorgeous
BRYAN L B on Mar 30, 2017
Looking to attract more butterflies and hummingbirds to the yard. Thought we'd give this a shot and see.
Jason H on Feb 24, 2017
The coloring looks so beautiful. Plus I would love to attract butterflies to my yard.
Alesia D on Feb 23, 2017
butterfly bush
Steve J on Feb 22, 2017
These bushes will be the started of my butterfly garden
Hotgrits40 on Dec 28, 2018
My mother's best friend passed away and she loved butterflies.
Linda L on Aug 28, 2018
I need to know if you trim the Bush at some point & when & how fare down the stem do I go? Also will it come back next year?
Sheila on Aug 27, 2014
BEST ANSWER: You don't have to trim Butterfly Bushes, but since they bloom on new growth, many gardeners prune theirs back every year to encourage more bloom and a smaller bush. In fact, in the northern portion of its range, Buddleia dies back to the ground every winter, achieving the same effect as a heavy pruning. You can cut the stems all the way back to 12 to 24 inches, depending on your personal taste; this should be done in late winter to early spring, but not in fall, for the hollow branches will hold water and split when it freezes.
fertilizer for butterfly bush?
A shopper on Jun 6, 2014
BEST ANSWER: The Black Knight Butterfly Bush generally doesn't need any fertilizer, If your lawn is missing some nutrients or you would like to give your bush a bush use 10-10-10.
how often to water? can it be overwatered?
A shopper on Aug 6, 2014
BEST ANSWER: Bushes can be thing to do is to make sure
that the ROOTS are in shade and keep an eye on the surrounding
earth (w/o disturbing roots). You'll be able to dig down....away from where
this beauty grows too check how dry the surrounding area is....
Do deer bother this bush?
A shopper on Sep 8, 2014
BEST ANSWER: Butterfly Bushes are considered deer resistant, as they do not come high on the list of Deer's Favorite Foods. That being said, a hungry deer will eat most anything, so if your plant is readily accessible and food is scarce, your Black Knight might be nibbled on. The good news is that Buddleia takes pruning well, whether by you or by deer!
Will it attract Bees?
Paula J on Sep 10, 2015
BEST ANSWER: I haven't seen any bees at that bush but the bees sure like our lavender bush which is close to it. Our buttlerly population has been in decline for the last few years and so has the bee population and that may be why I haven't seen the bees at the bush. Hope this helps you.
How deep and widespread is the root system? Can this be planted next to a home's foundation?
Michelle J on Aug 9, 2015
Our butterfly bush is 2 years old and is quite large. We planted it in a border around our patio in full sun and it us very happy. I cannot image this bushlanted cole to a foundation because the canopy is so wide. Better to plant further away from the house so you can see it blooming. The bush arrived in a box and was planted in the fall. Grew well and bloomed first year but really took took off this year. I hope these comments are helpful to your planning.
Can I grow my butterfly bush in a pot for a while?
Jeff B on Feb 6, 2017
BEST ANSWER: Yes, shouldn't be a problem. Just be shure to climatize bush gradually prior to planting so you don't shock it to bad if you have it indoors.
Does this take full sun?
A shopper on Jun 7, 2014
BEST ANSWER: Takes full sun and blooms beautifully.
Do these plants attract hummingbirds?
Laurie on Apr 25, 2018
BEST ANSWER: Yes this attracts humming birds along with butterfly’s. It also attracts humming bird moths that are so interesting to watch.
Do I remove the dead stems after the growing season or leave them to shelter new growth ?
Bette B on May 22, 2015
BEST ANSWER: Yes, cut the whole plant down to about 10" after the winter is over. The entire plant grows back up from the ground. It will be twice as big this year. I love it! Also, if you want more blooms, dead head the died off blooms and new ones will keep forming.
Is it drought tolerant?
Channah01 on Apr 30, 2017
BEST ANSWER: I live in northern NJ and last summer/ fall we had water restrictions., not a true drought but low water tables. This spring the butterfly bush is growing just fine for a second year.
Is this deer resistant ?
Anne C on Mar 17, 2016
BEST ANSWER: This does appear to be resistant to deer. We have many deer by us, so I think it would be noticed . We love this bush!
Do I need to prune or cut back butterfly bush in the fall? I live in IL.
Barry B on Nov 3, 2015
BEST ANSWER: I trim mine back in the Fall so it gets bushier. If you don't will grow tall and stringy.
Im thinking of purchases 2 of these bushes. Will they eventually act as a privacy fence?
Jo P on Dec 10, 2017
BEST ANSWER: Oh my gosh yes! They get HUGE!
I live in zone 9. Best time to prune /cut the Bush ?
Vaiju M on Nov 16, 2017
BEST ANSWER: These plants can be pruned annually. You can remove spent blooms on the plant to encourage more blooms to come out on the bush. Butterfly Bushes can also be pruned to not only shape them, but to encourage more aggressive new growth. You can prune them towards the ground to accomplish this. It can be done during the plant's dormancy period either in late fall to early winter or during the spring.
Are these bushes good near a pool?
L H on Oct 23, 2017
BEST ANSWER: Our black knight butterfly is against the fence but it is also close to our pool. We love our bush. It has tripled in size since planting and is planted in direct sunlight.
I live in Florida. We do get a lot of rain. I'm trying to encourage the butterflies in the backyard and would like to get some hummingbirds. Is it too moist in this environment for that plant?
Shannon C on Nov 1, 2016
BEST ANSWER: They do like moist soil, but not saturated.
Is this plant harmful to animals?
Kimberly W on Aug 29, 2015
BEST ANSWER: In no way. It attracts butterflies, moths and bees and is very showy
Mike M
can you plant a butterfly bush in a large pot?
Denise S on Jun 13, 2015
BEST ANSWER: They do prefer to be planted in the ground, but if you wish to plant it in a container I would say it should be at least 15 gallons.
How long does this bush bloom?
A shopper on Oct 6, 2014
BEST ANSWER: In north Texas this bloomed almost the whole summer, around 4 months if not longer

Shipping Details

Most items ship the next business day unless otherwise noted

Estimated Shipping Time: Most orders ship immediately, however some orders may ship in 1-2 business days (we do not ship on the weekends) from date of purchase. As noted on the website, some items are seasonal, and may only ship in spring or fall. Once your order is shipped, you'll receive an email with a tracking number.

Shipping Alert:

You can still order, but due to cold weather, we have delayed shipping to the areas shaded on the map below. We want your new plant to thrive right out of the box, so we will wait on shipping your order until the weather is ideal. This includes anyone in Growing Zones 3, 4, or 5. If you are unsure of your growing zone, visit our Growing Zone Finder.

We will resume normal shipping in the Spring. Please see the table below for your approximate ship date.

Zone Map


Shipping Resumes

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Week of Apr 29th

Zones 5

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Zone 6

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Zones 7-11

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