Delphinium 'Black Knight'
Delphinium Black Knight Group, Delphinium 'Black Knight'
Delphinium Delphinium
'Black Knight' _ 'Black Knight' is a tall perennial with dense flower spikes of semi-double, dark purple flowers with black 'eyes' in summer.
Delphinium 'Black Knight' is: Deciduous
Clump-forming, Erect
All parts of the plant may cause severe discomfort if ingested. Contact with sap may cause skin irritation.
Dark-purple in Summer
Green in Summer
Caterpillars , Slugs , Snails , Leaf-mining sawflies Caterpillars , Slugs , Snails , Leaf-mining sawflies
Black blotch of Delphinium , Crown rot , Powdery mildew Black blotch of Delphinium , Crown rot , Powdery mildew
Deadhead by cutting spent flower spikes back to small flowering side shoots. Cut down all growth to ground level after it has withered in autumn.
Divide every 3-4 years to maintain vigour.
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Delphinium 'Black Knight' (Delphinium 'Black Knight') will reach a height of 1.7m and a spread of 0.75m after 2-5 years.
Cottage/Informal, Flower Arranging, Beds and borders
Plant in a fertile, well-drained soil in full sun. Apply a fortnightly balanced liquid feed during the growing season. Stake with bamboo canes in mid-spring.
Chalky, Loamy, Sandy
Well-drained, Moist but well-drained
Acid, Alkaline, Neutral
Partial Shade, Full Sun
South, East, West
Exposed, Sheltered
Hardy (H4)
We do not currently have companion plants added for this plant.
Delphinium 'Black Knight'
Delphinium Black Knight Group, Delphinium 'Black Knight'
Delphinium Delphinium
'Black Knight' _ 'Black Knight' is a tall perennial with dense flower spikes of semi-double, dark purple flowers with black 'eyes' in summer.
Deciduous
Clump-forming, Erect
All parts of the plant may cause severe discomfort if ingested. Contact with sap may cause skin irritation.
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Dark-purple in Summer
Green in Summer
Caterpillars , Slugs , Snails , Leaf-mining sawflies
Black blotch of Delphinium , Crown rot , Powdery mildew
Deadhead by cutting spent flower spikes back to small flowering side shoots. Cut down all growth to ground level after it has withered in autumn.
Divide every 3-4 years to maintain vigour.
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Delphinium 'Black Knight' (Delphinium 'Black Knight') will reach a height of 1.7m and a spread of 0.75m after 2-5 years.
Cottage/Informal, Flower Arranging, Beds and borders
Plant in a fertile, well-drained soil in full sun. Apply a fortnightly balanced liquid feed during the growing season. Stake with bamboo canes in mid-spring.
Chalky, Loamy, Sandy
Well-drained, Moist but well-drained
Acid, Alkaline, Neutral
Partial Shade, Full Sun
South, East, West
Exposed, Sheltered
Hardy (H4)
Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3
Delphinium 'Black Knight' (Delphinium 'Black Knight')
Phytophthora tentaculata Kröber & Marwitz - All Hosts
Oomycete
Absent
5
3
Polyphagous pathogen present in parts of Europe and beyond.
Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.
Traveling or importing plants? Please read "Don't risk it" advice here
Suspected outbreak? Click here for contact details to report to the relevant authority.
Date updated: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/
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This plant likes... | Garden match | |
Soil types: | Chalky, Loamy, Sandy | Tell us... |
Soil drainage: | Well-drained, Moist but well-drained | Tell us... |
Soil pH: | Acid, Alkaline, Neutral | Tell us... |
Light: | Partial Shade, Full Sun | Tell us... |
Aspect: | South, East, West | Tell us... |
Exposure: | Exposed, Sheltered | Tell us... |
Hardiness: | Hardy (H4) | Tell us... |
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