Botanical Name: Caryopteris x clandonensis 'Dark Knight'
Common Name: Dark Knight Caryopteris  
Plant photo of: Caryopteris x clandonensis 'Dark Knight'
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Water Saving Tip:

In general, lawns only need to be watered once every three days.

Check your irrigation controller and reduce watering times if necessary.

  • Anatomy

  • Culture

  • Design

Plant Type



Height Range



Flower Color

Blue, Lavender


Flower Season

Summer, Fall


Leaf Color

Grey Green


Bark Color



Fruit Color



Fruit Season



Full, Half



Low, Medium, Extra in Summer


Growth Rate



Soil Type

Sandy, Clay, Loam, Rocky, Unparticular


Soil Condition

Average, Rich, Poor, Well-drained, Dry


Soil pH

Neutral, Basic


Adverse Factors

Attracts Bees

Design Styles

English Cottage, Formal, Mediterranean, Ranch, Spanish


Accenting Features

Fragrance, Showy Flowers, Unusual Foliage


Seasonal Interest

Summer, Fall


Location Uses

Entry, Perennial Border, Shrub Border, Foundation, Patio, Raised Planter, Walkways


Special Uses

Cut Flowers, Hedge, Mass Planting, Small Spaces


Attracts Wildlife


Information by: Stephanie Duer
  • Description

  • Notes

'Dark Knight' features a profuse, shrub-covering bloom of fragrant, deep bluish-purple flowers that appear at the ends of branches from July to September. Oval to lance-shaped, dull green leaves have silvery undersides and is aromatic when brushed with a hand. Flowers are very attractive to butterflies, bees, and other beneficial insects. May be found sold under that name 'Black Knight.' Grows about 2 feet tall and wide.
A nice addition to a sunny shrub or perennial border; also makes a nice hedge. Prefers full to part sun and well drained soil. Over-watering tends to make the plant rangy and may encourage lots of little seedlings. Wood often does not survive the winter, and so pruning back hard in late winter to early spring is recommended; it will also help to keep it tidy. Caryopteris is both deer and rabbit resistant. Attracts bees and butterflies. If over-watered, caryopteris may grow taller and be more sprawlish.