Butterfly bush Buddleja davidii 'Black Knight' pot

Size: Hoogtemaat leidend

20-30cm

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Pot 2 ltr. (C2)

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Temporarily sold out
- 60-80cm
  
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  Pot 10 ltr. (C10)
  
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  From 33.40
  
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- 80-100cm
  
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  Pot 12 ltr. (C12)
  
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  From 38.80
  
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- 30-40cm
  
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  Pot 3 ltr. (C3)
  
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  From 12.90
  
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  Temporarily sold out
- 20-30cm
  
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  Pot 2 ltr. (C2)
  
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  From 10.75
  
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  Temporarily sold out

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2+ £11.95

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12+ -5.0% £11.35

24+ -7.5% £11.05

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Benefits according to our specialist

Rich flowering
Low maintenance
Attracts butterflies

Plant features
Description
Planting and care
Packaging and shipping

Genus
BuddleJa (view all varieties)

Root type
Pot

Pot size
2 ltr. (C2)

Flowering months
July, August, September

Leaf colour
Purple

Possibilities
Border, Group planting, Solitary

Soil type
All soil types, well-drained

Positioning
Semi-shade, Sun

Winter hardiness
-20,6°C / -15,0°C , USDA zone 6b/7a

Fruit-bearing plants
No

Water needs
Average water

Number of plants per m²
1

Evergreen plants
No

Leaf colour
Green

Fragrant plants
Yes

Growth habit
Upright to bushy growth habit

Height at time of delivery excluding pot/clod
20-30

Mature height (cm)
200

Art. no.
1000144

Description

Buddleja davidii 'Black Knight' | Butterfly bush

The Buddleja davidii 'Black Knight' is a captivating and fragrant shrub, widely recognized for its ability to attract butterflies, hence the common name, butterfly bush. This robust and hardy plant is an exceptional addition to any garden, offering striking deep purple blooms that last from midsummer into the heart of autumn.

Key Features

The allure of the Buddleja lies in its rich purple flowers which exude an enchanting scent, irresistible to both humans and pollinators alike.
This deciduous shrub boasts an upright to bushy growth habit, reaching an ultimate height of approximately 2 meters, making it a versatile choice for borders, group plantings, or as a stunning solitary specimen.
The 'Black Knight' is undemanding when it comes to soil requirements, flourishing in a variety of well-drained conditions.
Its foliage, a vibrant green with white undersides, adds a refreshing contrast to its dark flowers throughout the growing seasons.

Tips

To ensure the vitality and flowering potential of your Buddleja davidii 'Black Knight', it is best to prune in early to mid-spring, just as the buds begin to swell, which will encourage new growth and an abundance of blooms.
While drought-resistant once established, regular watering will help maintain its health and enhance flowering, especially during dry periods.
Full sun to partial shade is ideal for this plant, with the sunniest locations resulting in the most prolific blooms.
If you wish to propagate the Butterfly Bush, semi-ripe cuttings can be taken and rooted to create new plants, ensuring the continued presence of this stunning shrub in your garden.

Ideal placement of a Buddleja davidii 'Black Knight'

For optimal growth and flowering, Buddleja davidii 'Black Knight' should be positioned in a location that receives full sun to partial shade. While the plant can tolerate a variety of soil conditions, it thrives best in well-drained soil, which enables its root system to develop properly without becoming waterlogged. This shrub's ability to resist drought makes it a suitable choice for gardeners seeking resilient additions to their borders or group plantings. The upright to bushy growth habit of this species ensures a striking presence, especially when its fragrant, purple blooms come to life in the warmer months.

How do I plant a Buddleja davidii 'Black Knight'?

When establishing Buddleja davidii 'Black Knight', select a well-draining location with full sun to partial shade. The shrub's root system, nurtured within a pot, is primed for planting at any time that is free from frost. To encourage an upright and bushy growth habit, provide ample space for the shrub to mature, reaching up to 2 meters in height. Upon planting, ensure the soil is kept moist to facilitate root establishment, yet be mindful of its average water needs as it matures. Its drought resistance will increase as the plant becomes established in its new environment.

Pruning a Buddleja davidii 'Black Knight'

To encourage robust growth and abundant flowering, Buddleja davidii 'Black Knight' should be pruned in early to mid-spring, timing it as the new buds start to show signs of swelling but after the risk of severe frost has diminished. Cut back the previous year's growth to a set of healthy buds, ensuring that you leave a framework of old wood, as this species blooms on new shoots. Pruning not only stimulates fresh growth but also helps maintain an attractive, bushy form.

Watering a Buddleja davidii 'Black Knight'

The Buddleja davidii 'Black Knight' requires average watering, with a focus on well-draining soil to prevent waterlogging. Due to its drought-resistant nature, it can withstand short periods of dry weather. However, to promote a healthy growth habit and abundant flowering, it is advisable to maintain consistent moisture, especially during the warmer flowering months of July through September. For optimal moisture, water the plant deeply and infrequently, allowing the soil to dry out slightly between watering sessions. This method encourages a strong, deep root system, supporting the shrub's upright to bushy growth and ensuring it thrives in both sun and partial shade.

Fertilising a Buddleja davidii 'Black Knight'

To support the vigorous flowering of this species, a balanced approach to fertilization is recommended. Apply a complete, slow-release fertilizer in early spring, as new growth emerges. This will provide the plant with essential nutrients for a robust start to the season. Since it is a deciduous shrub with a strong growth pattern, an additional feeding may be beneficial in the early summer months to sustain its development and enhance the richness of its purple blooms. It is important to ensure that the fertilizer is spread evenly around the base of the plant, avoiding direct contact with the stem and foliage to prevent burn. Water thoroughly after applying fertilizer to aid in nutrient absorption and to maintain the plant's average water needs.

The characteristics of a Buddleja davidii 'Black Knight'

The Buddleja davidii 'Black Knight' is a magnificent addition to any garden, thriving in a pot with well-draining soil. Its deep purple, almost black flowers are a magnet for pollinators, creating a lively atmosphere as butterflies flock to its blooms. This cultivar's robust nature allows it to adapt well to various soil types, provided they are well-aerated. Its gracefully arching branches add an element of structure and elegance to garden spaces, both large and small.

What will be the height of Buddleja davidii 'Black Knight'?

Buddleja davidii 'Black Knight' can grow to a height of 2 meters when fully mature.

Which soil type is most suitable for the Buddleja davidii 'Black Knight'?

For Buddleja davidii 'Black Knight', it is adaptable to various soil types as long as the soil is well-drained. Ensuring proper drainage is essential for the plant's healthy growth and development.

What is the ideal positioning for the Buddleja davidii 'Black Knight'?

Buddleja davidii 'Black Knight' thrives in locations with both sun and partial shade. This plant can be ideally placed in areas where it can receive direct sunlight as well as in spots where the sunlight is partially filtered.

What is the flowering colour of the Buddleja davidii 'Black Knight'?

The blossoms of Buddleja davidii 'Black Knight' display a rich purple hue, adding a striking and elegant touch to the plant.

Is the Buddleja davidii 'Black Knight' hardy?

Buddleja davidii 'Black Knight' is considered winter hardy. It can endure temperatures ranging from -20.6°C to -15.0°C, falling within the USDA hardiness zones 6b to 7a. This indicates that the Buddleja davidii 'Black Knight' is well-suited to withstand winter conditions within these specified temperature ranges.

Is the Buddleja davidii 'Black Knight' evergreen?

Buddleja davidii 'Black Knight' is not an evergreen plant. It is deciduous, shedding its leaves during the autumn season and regrowing them in the spring.

What is the growth strength of the Buddleja davidii 'Black Knight'?

Buddleja davidii 'Black Knight' is known for its gradual growth, typically taking 5 to 10 years to reach its ultimate height. This slow but steady growth rate allows for a well-established and mature plant over time.

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