Sedum 'Black Knight'
Sedum 'Black Knight'
Sedum 'Black Knight'
Sedum 'Black Knight'
Sedum 'Black Knight'
Sedum 'Black Knight'

Sedum 'Black Knight'

syn. Hylotelephium 'Black Knight'

Sedum 'Black Knight'

1 bare root — £6.95

Spring planting season is currently closed 
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Delivery schedule

Orders placed until 29 February 2025
You can expect your order in February/March 2025

Orders placed 1 March - 15 April 2025
You can expect your order in March/April 2025

Orders placed 16 April - 15 May 2025
You can expect your order within 10 business days

Available for (pre)ordering again in December
Free delivery on UK orders over £50
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Shipping to the UK

UK orders over £50
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UK orders under £50
£4.99

Northern Ireland orders under £50
£5.99

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Description

Deeply on-trend with its dark sultry colours, Sedum 'Black Knight' creates a gorgeous and long-lasting impression. This knight in shining armour will come to the rescue of any flagging late summer gardens! Its aubergine-purple, almost black fleshy leaves with their metallic sheen are a huge asset all through the growing season, and contrast dramatically with the reddish-pink flowers. When these generous blooms arrive in late summer, they emerge from pink stems to form domed clusters of starry flowers in a lovely mix of magenta and rose-pink. This stunning stonecrop doesn’t get too big either, staying bushy and compact, and is also armour- clad with great disease resistance. As with all Sedum, 'Black Knight' provides feast for pollinators. Late in the season, bees really need and appreciate stocking up on that valuable food source to help see them through winter.

Sedum, now known as Hylotelephium, are typically tough as old boots, and Sedum 'Black Knight' is no exception. These resilient border plants have superb resistance to drought, often growing in poor, rocky soils. Supplied a bare roots, it’s a good idea to give them a soft start to begin with in small temporary pots before going out into more challenging conditions. Once settled, they’ll thrive in hot, dry sites, where the soil is free draining, and once they’re established they’ll look after themselves. As an element in the garden, they give a lot: beautiful leaf texture that contrasts well with other plants, pollinator-friendly and dramatic flowers, and then great winter structure if these are left on the plant to form decorative seedheads. The colours of Sedum 'Black Knight' are an added bonus, creating gorgeous contrasts with silver-leaved plants as well as other late-summer plants, such as Rudbeckia and Echinacea. You can also grow this strong and compact variety in patio containers and gravel gardens.

Key features

  • Comes back every year

  • Attractive to wildlife

  • Loved by pollinators

  • Thrives well in full sun

  • In peat-free compost

  • Low maintenance

  • RHS Award (AGM)

  • Drought tolerant

  • Fully hardy

Specs & details

  • Botanical name

    Sedum 'Black Knight' syn.
    Hylotelephium telephium 'Black Knight'

  • Flower colour

    Red

  • Plant size

    1

  • Established height

    30-50cm

  • Established spread

    30-50cm

  • Plant spacing

    9 plants per m2

  • Leaf colour

    Purple, near-black

  • Habit

    Upright
    Clump-forming

  • Life cycle

    Perennial

  • Hardiness

    Fully hardy

  • Years to establish

    2-3 years

  • Sunlight

    Full sun

  • Position

    Sheltered

  • Suitable for

    Large containers
    Borders
    Gravel gardens
    Wildlife gardens
    Cottage gardens
    Low maintenance gardens

  • Soil acidity

    Any

  • Soil moisture

    Dry
    Free draining

  • Soil type

    Loam
    Sandy
    Multipurpose compost
    Loam-based compost

  • Growing skill

    Easy to grow

  • Scented

    No

  • Pollinator-friendly

    Yes

  • Mouse resistant

    No

  • Rabbit resistant

    Yes

  • Deer resistant

    Yes

  • Toxicity

    Harmful if eaten
    Skin/eyes irritant

Plant calendar

JanFebMarAprMayJuneJulyAugSepOctNovDec
  • Planting
  • Flowering

Useful information

    • Soak the Sedum 'Black Knight' roots in water for 3-6 hours prior to planting

    • Plant your syn. Hylotelephium 'Black Knight' bare roots into temporary pots with a multipurpose compost in spring and grow-on in a sheltered spot outdoors

    • Choose a pot which comfortably fits the bare roots. Some have a noticeable crown which should be just below the soil surface with any top growth exposed. Some varieties are a length of root which should be planted lengthways and shallowly (1-2cm deep).

    • Plant out into borders or permanent containers in late spring or early summer once in full growth. Choose a position in sun or shade depending on the variety.

    Read all planting & care instructions

  • Orders placed until 29 February 2025
    You can expect your order in February/March 2025

    Orders placed 1 March - 15 April 2025
    You can expect your order in March/April 2025

    Orders placed 16 April - 15 May 2025
    You can expect your order within 10 business days

Perennials in 1 minute

The beauty of perennial plants doesn’t just lie in their long-lasting flowers and sturdy, resilient nature, but it’s their sheer determination to keep on coming back stronger every year —in year one they’re good, but in future years they’re even better!

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