Canna × ehemanii
Ehemann's canna
Large, upright perennial about 1.9m tall, with broad paddle-shaped, blue-green leaves with red margins, and bearing large, waxy bright pinkish-red flowers on tall stems, from midsummer to early autumn
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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 | Blue Green | |||
|---|---|---|---|---|
| Summer | Pink Red | Blue Green | ||
| Autumn | Pink Red | Blue Green | ||
| Winter |
Position
- Full sun
Aspect
West–facing or South–facing
Exposure
Sheltered Hardiness
H3Botanical details
- Family
- Cannaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- Genus
Canna are rhizomatous herbaceous perennials with erect stems bearing ovate leaves, with showy flowers with showy petal-like staminodes and small, coloured petals and sepals, borne in racemes or panicles in summer and autumn
- Name status
Correct
How to grow
Cultivation
As a patio plant grow in pots of loamless compost in a sheltered site in full sun. Plants can also be planted into a sunny border. Water freely and apply a high potassium feed every 2-3 weeks in the growing season. Lift the rhizomes in autumn when frost blackens the foliage. Store over winter in barely moist compost in frost-free conditions. See canna cultivation for further information
Propagation
Propagate by division in spring, or propagate by seed (sown indoors) in spring. The seed needs to be chipped or soaked in warm water for 24 hours prior to sowing
Suggested planting locations and garden types
- Architectural
- Cottage and informal garden
- City and courtyard gardens
- Coastal
- Patio and container plants
- Sub-tropical
- Flower borders and beds
Pruning
Deadhead to promote continued flowering. Leave to dieback in autumn
Pests
Maybe susceptible to glasshouse red spider mite, slugs and caterpillars
Diseases
Canna can be susceptible to a virus
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