Overview
Delphinium 'Joan Edwards' is a columnar upright herbaceous perennial in the genus Delphinium, part of the Ranunculaceae family, with deciduous foliage. Delphinium 'Joan Edwards' grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H5. Suggested uses include cottage and informal garden and wildlife gardens.
About
Delphinium 'Joan Edwards' is a herbaceous perennial cultivar within the Delphinium genus, known for its columnar upright habit and deciduous foliage. Like other Delphiniums, it features prominent bowl-shaped flowers arranged in spikes, thriving best in full sun with a sheltered position. It prefers fertile, well-drained soils of various types and pH levels, including chalk, clay, loam, and sand. Hardy to UK zone H5, this cultivar is suited to cottage and informal gardens as well as wildlife gardens, offering seasonal interest during spring and summer.
Growing conditions
Best soil and position for Delphinium
- Sunlight
- Full sun
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- South-facing, East-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H5
Plant details
Delphinium 'Joan Edwards' size, habit and characteristics
- Plant type
- Herbaceous Perennial
- Habit
- Columnar upright
- Foliage
- Deciduous
- Suggested uses
- Cottage and informal garden, Wildlife gardens
Care notes
Pruning and caring for Delphinium 'Joan Edwards'
- Propagation
- Propagate by taking pencil thick basal cuttings in early spring or propagate by seed in spring or autumn (cultivars will not come true)
- Pest resistance
- May be susceptible to aphids, earwigs, delphinium leaf miner, delphinium moth caterpillars, slugs, snails and caterpillars
- Disease resistance
- May be susceptible to powdery mildews, delphinium black blotch, crown rot and viruses
Frequently asked questions
Where is the best place to plant Delphinium 'Joan Edwards'?
Delphinium 'Joan Edwards' prefers full sun. It suits sheltered positions.
What soil does Delphinium 'Joan Edwards' need?
Delphinium 'Joan Edwards' is adaptable and grows happily in most soil types, including chalk, clay, loam and sand. It is happy in soil of any pH. Aim for soil that stays moist but well-drained to well-drained.
Is Delphinium 'Joan Edwards' hardy in the UK?
Delphinium 'Joan Edwards' 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 'Joan Edwards'?
Propagate by taking pencil thick basal cuttings in early spring or propagate by seed in spring or autumn (cultivars will not come true).
More in the Delphinium genus
- Delphinium 'Blue Bell'
- Delphinium 'Ailsa'
- Delphinium 'Alison Claire'
- Delphinium 'Ambrose Woods'
- Delphinium 'Angela Rowe'
- Delphinium 'Ann Woodfield'
- Delphinium 'Anne Page'
- Delphinium 'Ariel Blue'