Butterfly Bush (Buddleja davidii 'Black Knight') in the Butterfly Bushes Database

1 company sells this plant

Common names:
Give a thumbs up Butterfly Bush
Give a thumbs up Buddlea
Give a thumbs up Summer Lilac
Give a thumbs up Orange-eye Butterfly Bush

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General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Plant Height: 12 feet plus if not cut back but can be maintained as a bush
Plant Spread: 5 feet
Leaves: Deciduous
Fruit: Edible to birds
Flowers: Showy
Blooms on new wood
Flower Color: Purple
Flower Time: Summer
Late summer or early fall
Uses: Flowering Tree
Wildlife Attractant: Bees
Propagation: Seeds: Will not come true from seed
Propagation: Other methods: Cuttings: Stem


The ATP Top 50 Trees and ShrubsThe ATP Top 50 Trees and Shrubs
July 5, 2014

Let's open Trees and Shrubs week with a list of the most popular of these woody plants in our database. There are a lot of great plants in this list!

(Full article23 comments)
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Posted by Bonehead (Pacific NW - Zone 8b) on Apr 7, 2014 4:09 PM

This has escaped in the Pacific Northwest and is on the non-native invasive list. Reputable nurseries will offer sterile cultivars of Buddleja. Please plant responsibly.

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Posted by okus (Lincolnshire, UK) on Sep 23, 2011 7:29 AM

When we grew this in Texas it never reached the size it can in cooler areas, but it did flower twice in the year, early summer and fall. It does well in poor soils and can take a great deal of neglect.

In the UK it self seeds and comes up in odd places like between paving slabs, if it does, remove early as once the roots get established it is very difficult to shift.

It can be cut back drastically once flowering is done and will grow back again and flower in the one year. If left to grow to tree size the stems can become brittle and snap in high winds.

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Posted by BookerC1 (Mackinaw, IL - Zone 5a) on Jan 10, 2012 5:40 PM

Details from the plant tag:
Dig hole 2 times the width of pot. Set top of root ball even with ground level. Combine planting mix and soil. Fill to ground level and tamp. Form water basin, water to settle soil. Add layer of mulch. Check often for water needs until established. Fertilize spring and summer.

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Posted by Skiekitty (Denver Metro - Zone 5a) on Feb 19, 2013 11:46 AM

Very xeric plant, grows over 6' tall and wide for me. Gets blasted by full sun for 4-6 hours a day in a rock garden. Attracts butterflies and moths readily, you can smell it literally 10 feet away. Highly recommended if you have the space for a huge plant! Does not like to be trimmed however. A very leggy plant.

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Posted by robertduval14 (Mason, New Hampshire - Zone 5b) on Mar 3, 2013 9:14 PM

Great deep purple color. Like all Buddleja, it smells wonderful.

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Plant Events from our members
piksihk On December 1, 2013 Plant Ended (Removed, Died, Discarded, etc)
jg0613 On June 15, 2015 Obtained plant
Bought plant at local Menards- gallon container. Transplanted into ground. Middle of back yard, N fenced section. Date approximate.
beenthere On May 7, 2018 Obtained plant
From dogwoodritter on ebay.
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Discussion Threads about this plant
Thread Title Last Reply Replies
Blooming in October.... by wcgypsy Oct 28, 2016 10:24 AM 29
What is this absolutely AMAZING Giant Flowering "WEED" ?? by Mahogan Jul 25, 2016 3:05 PM 15
What's Blooming in June... by wcgypsy Jun 30, 2015 12:01 PM 112
Chat thread by wcgypsy Feb 21, 2019 10:31 PM 11,430

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