Delphinium 'Black Knight Group'


9cm pot
pot size guide
£4.89 Buy
Delivery options
  • Standard £4.99
  • Next / named day £6.99
  • Click & collect FREE

See more info on delivery options

Dark strong verticals, of deep purple-blue flowers with sultry black eyes, in summer -perfect with a cocktail of pale lemon achilleas and anthemis

Val Bourne - Garden Writer

5 year guarantee

  • Position: full sun
  • Soil: fertile, well-drained soil
  • Rate of growth: average
  • Flowering period: June and July
  • Hardiness: fully hardy

    Stately spires of semi-double, deep purple flowers, opening in June and July on tall stems. These dark-eyed delphiniums look fantastic planted in bold clumps as part of a cottage-garden scheme or towards the back of a well-drained, sunny border, where they will add height and bold splashes of colour. They also make excellent cut flowers.

  • Garden care: Protect young foliage against slug and snail damage in spring. Stake with bamboo canes in mid-spring, before the flowers appear. During the growing season, apply a balanced liquid fertiliser every 2-3 weeks and wearing gloves cut back the faded flower-stems to a flowering side-shoot to encourage repeat flowering. At the end of autumn cut back and compost the faded flower stems.

  • Harmful if eaten

Achillea 'Moonshine'


Lovely, large sulphur-yellow flowers

£8.99 Buy

Anemone hupehensis var. japonica 'Pamina'

Japanese anemone

A profusion of dark pink, double flowers

£5.99 Buy

Astrantia major 'Rubra'

great black masterwort

Gorgeous plum-coloured flowers

£6.99 Buy

Echinops bannaticus 'Taplow Blue'

blue globe thistle

Spherical, bright blue flower-heads

£5.99 Buy


by PowerReviews
CrocusDelphinium 'Black Knight Group'

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to top


Too young to flower yet

By Chris

from Near Lymington

Verified Buyer


  • Accurate Instructions
  • Attractive
  • Healthy


    Best Uses

    • Garden

    Comments about Delphinium 'Black Knight Group':

    Grew slowly over Summer, but has died down now.looking forward to seeing it in Spring

    • Your Gardening Experience:
    • Experienced

    Displaying review 1

    Back to top


    Do you want to ask a question about this?

    If so, click on the button and fill in the box below. We will post the question on the website, together with your alias (bunnykins, digger1, plantdotty etc etc) and where you are from (Sunningdale/Glasgow etc). We'll also post the answer to your question!
    2 Questions | 2 Answers
    Displaying questions 1-2
    • Q:

      When should I plant Delphiniums, Foxgloves and Hollyhocks, and what will I gett in a pot?

      Hi there, I have a brand new, small, garden (approx. 36' by 30') and am in the process of creating borders. I'm aiming for fairly deep borders as I would like loads of cottage garden flowers. I am thinking of having a few evergreen / deciduous shrubs here and there to form some permanent interest. My gardening knowledge is more or less at the 'beginner' stage so I need some advice please. Is it okay to plant the shrubs now as long as the ground isn't frozen? When should I plant the perennials and annuals? Spring time? When I order for example Hollyhocks, Delphiniums and Foxgloves, and what do I get in the pot? Is it one plant that will produce one flowerhead? If I wanted to make a big colour impact, would I need to order loads of each plant? I look forward to hearing from you. Many thanks, Lynn
      Asked on 10/12/2009 by Wilson Lynn

      1 answer

      • A:

        Hello Lynn, You can plant any fully hardy plant at any time of the year
        as long as the ground is not frozen, but the ideal times are spring or
        autumn. Annuals only live for 1 year, some will flower in winter, while
        others flower in summer, so the planting time will depend on what type
        they are. As for the herbaceous perennials, these can be planted anytime
        as long as they are hardy, you will get 1 plant per pot. Each plant and
        species will produce flowers in different way. The ones you mention
        will generally produce 1 main flowerspike and a couple of smaller
        side-shoots, and if you cut them back when they start to fade you can
        often encourage a second flush later in the year. Finally then, if you
        want big impact, then yes you will need a lot of plants. I hope this
        helps. Helen Plant Doctor

        Answered on 11/12/2009 by Wilson Lynn
    • Q:

      When should I plant Delphiniums?

      I am interested in purchasing some Delphinium plants. When is the best time to buy and to plant? I live in Scotland and the winters here are both damp and cold.
      Asked on 25/11/2005 by alistair mackie

      1 answer

      • A:

        As a rule hardy plants that are grown in containers, can be planted at any time of year as long as the soil isn't frozen solid. The best times are in the autumn when the soil is still warm enough to encourage root growth but the plant isn't in active growth, or the spring before the temperatures start to rise, however you can also plant throughout summer as long as you make sure the plant is kept well watered.

        Answered on 30/11/2005 by Crocus
    Displaying questions 1-2

    Do you have a question about this product? 

    How to get more flowers

    How to get more flowers

    Many flowering plants can be encouraged to produce better and longer-lasting displays with the minimum of effort. A plant produces flowers in order to reproduce and ensure the survival of the species. Once a plant has flowered and fertilisation has taken

    Read full article

    Cottage garden

    The traditional cottage garden was an intensive, yet carefree mixture of fruit, vegetables, herbs and flowers all crowded into a tiny space. Today, this informal charm can be recreated using modern varieties that largely take care of themselves around an

    Read full article

    Get more flowers

    Deadheading will prevent them setting seed and so use their energy producing a further flush of blooms later on. Plants that respond well to deadheading include annuals such as Ageratum, Alyssum, Antirrhinum, Calendula, Centaurea, Cosmos, Dahlia, foxglove

    Read full article

    The Chelsea Chop (and other methods of extending the flowering season)

    Many gardeners who are happy, even gung-ho, with the secateurs when pruning shrubs and climbers are surprisingly reluctant to take the shears to herbaceous perennials. Maybe this is because it just doesn't seem quite right to be cutting back all that new

    Read full article