Overview
Delphinium 'Black Knight' is a tall, upright perennial in the genus Delphinium, part of the Ranunculaceae family, with green, palmate leaves foliage. Delphinium 'Black Knight' grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H7. Suggested uses include borders and cut flowers.
About
Delphinium 'Black Knight' is a tall, upright cultivar of the Delphinium genus, which comprises about 300 species of annual and perennial flowering plants in the Ranunculaceae family. This cultivar features green, palmate leaves and thrives best in full sun with a south-facing, sheltered aspect. It prefers moist but well-drained loam soil with a neutral pH and is hardy in the UK (H7). Suitable for borders and cut flowers, Delphinium 'Black Knight' can be propagated by division, basal cuttings, or seed.
About the genus
Delphinium is a genus of about 300 species of annual and perennial flowering plants in the family Ranunculaceae, native throughout the Northern Hemisphere and also on the high mountains of tropical Africa. The genus was erected by Carl Linnaeus.
Wikipedia contributors, "Delphinium", CC BY-SA 4.0 — Delphinium
Growing conditions
Best soil and position for Delphinium
- Sunlight
- Full sun
- Soil type
- Loam
- Soil pH
- Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing
- Exposure
- Sheltered
- UK hardiness
- H7
Plant details
Delphinium 'Black Knight' size, habit and characteristics
- Plant type
- Perennial
- Habit
- Tall, upright
- Foliage
- Green, palmate leaves
- Suggested uses
- Borders, cut flowers
- Toxicity
- Toxic if ingested
Care notes
Pruning and caring for Delphinium 'Black Knight'
- Cultivation
- Plant in spring or autumn in fertile, well-drained soil. Stake tall varieties to support flower spikes. Water regularly during dry periods.
- Pruning
- Cut back flower stems after flowering to encourage new growth. Remove dead foliage in autumn.
- Propagation
- Division, basal cuttings, seed
- Pest resistance
- Slugs, Snails
- Disease resistance
- Generally disease-free
Frequently asked questions
How do I grow Delphinium 'Black Knight'?
Plant in spring or autumn in fertile, well-drained soil. Stake tall varieties to support flower spikes. Water regularly during dry periods.
Where is the best place to plant Delphinium 'Black Knight'?
Delphinium 'Black Knight' prefers full sun. It suits sheltered positions.
What soil does Delphinium 'Black Knight' need?
Delphinium 'Black Knight' grows best in loam soil. It prefers neutral soil. Aim for soil that stays moist but well-drained.
How do I prune Delphinium 'Black Knight'?
Cut back flower stems after flowering to encourage new growth. Remove dead foliage in autumn.
Is Delphinium 'Black Knight' hardy in the UK?
Delphinium 'Black Knight' has an RHS hardiness rating of H7, meaning it is fully hardy throughout the UK, tolerating temperatures below -20°C.
How do I propagate Delphinium 'Black Knight'?
Division, basal cuttings, seed.
Is Delphinium 'Black Knight' toxic?
Toxic if ingested.
More in the Delphinium genus
- Delphinium 'Nora Ferguson'Larkspur
- Delphinium Hybrids, BelladonnaLarkspur
- Delphinium cheilanthumgarland larkspur
- Delphinium grandiflorum 'Hunky Dory White'Siberian Larkspur
- Delphinium requieniiLarkspur
- Delphinium tatsienenseLarkspur
- Delphinium × ruysii 'Pink Sensation'delphinium 'Pink Sensation'
- Delphinium 'Centurion White' (Centurion Series)delphinium 'Centurion White'
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