Overview
Delphinium 'Galahad' is a columnar upright perennial in the genus Delphinium, part of the Ranunculaceae family, with deciduous foliage. Delphinium 'Galahad' grows best in full sun, and tolerates well-drained and fertile soils and neutral to slightly alkaline pH. Its UK hardiness is rated H5. Suggested uses include borders and cut flowers.
About
Delphinium 'Galahad' is a perennial cultivar of the Delphinium genus, which comprises around 300 species of flowering plants in the Ranunculaceae family. This cultivar thrives in full sun on a south-facing, sheltered aspect, preferring well-drained, fertile soil that is neutral to slightly alkaline and kept moist. Hardy to UK zone H5, 'Galahad' is suitable for borders and as cut flowers. It requires staking to support its tall flower spikes and should be cut back after flowering to promote new growth. Like other delphiniums, it is toxic and should be handled with care.
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
- well-drained, fertile
- Soil pH
- neutral to slightly alkaline
- Soil moisture
- moist
- Aspect
- south-facing
- Exposure
- sheltered
- UK hardiness
- H5
Plant details
Delphinium 'Galahad' size, habit and characteristics
- Plant type
- perennial
- Habit
- Columnar upright
- Foliage
- Deciduous
- Suggested uses
- borders, cut flowers
- Toxicity
- toxic
Care notes
Pruning and caring for Delphinium 'Galahad'
- Cultivation
- Prefers rich, well-drained soil; stake tall flower spikes to prevent flopping.
- Pruning
- Cut back after flowering to encourage new growth.
- Propagation
- seed, division
- Pest resistance
- Aphids, Slugs, Snails, Leaf miners, Caterpillars
- Disease resistance
- Powdery mildews, Delphinium black blotch, Crown rot, Viruses
Frequently asked questions
How do I grow Delphinium 'Galahad'?
Prefers rich, well-drained soil; stake tall flower spikes to prevent flopping.
Where is the best place to plant Delphinium 'Galahad'?
Delphinium 'Galahad' prefers full sun. It suits sheltered positions.
What soil does Delphinium 'Galahad' need?
Delphinium 'Galahad' grows best in well-drained and fertile soil. It prefers neutral to slightly alkaline soil. Aim for soil that stays moist.
How do I prune Delphinium 'Galahad'?
Cut back after flowering to encourage new growth.
Is Delphinium 'Galahad' hardy in the UK?
Delphinium 'Galahad' has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Delphinium 'Galahad'?
Seed, division.
Is Delphinium 'Galahad' toxic?
Toxic.
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'