Delphinium 'Raymond Lister'
delphinium 'Raymond Lister'
'Raymond Lister' is an erect, strong-growing, free-flowering herbaceous perennial, up to 1.7m high, with an equal balance between lobed green leaves and tapering spikes of brown-eyed, mid-blue flowers in midsummer
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Size
Ultimate height
1.5–2.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Blue Brown | Green | ||
| Autumn | Green | |||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Ranunculaceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Columnar upright
- Potentially harmful
- Harmful if eaten. Wear gloves and wash hands after handling
- Genus
Delphinium can be annuals, biennials or perennials, with palmately lobed basal leaves and showy bowl-shaped flowers in spikes, racemes or panicles
- Name status
Accepted
How to grow
Cultivation
Grow in a fertile, well-drained soil in full sun; shelter from strong winds and provide stakes or other supports. See staking: perennials and delphinium cultivation for further advice
Propagation
Propagate by basal softwood cuttings in spring, or by division in early spring or early autumn
Suggested planting locations and garden types
- City and courtyard gardens
- Cottage and informal garden
- Cut flowers
- Flower borders and beds
Pruning
No pruning required except deadheading; cut stems down to ground level at the end of the growing season
Pests
May be susceptible to aphids, earwigs, delphinium leaf miner, delphinium moth caterpillars, slugs, snails and caterpillars
Diseases
May be susceptible to powdery mildews, delphinium black blotch, grey moulds, Sclerotinia disease, and cucumber mosaic virus
Get involved
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