About
Canna 'Roi Soleil' is a clump-forming perennial that reaches a height of approximately 1.5 meters. It features substantial, broad leaves with a glossy dark green hue and stems that have a purplish tint. From midsummer into autumn, this plant produces sizable, frilled flowers that are primarily bright red with yellow markings in the throat.
About the genus
Canna are herbaceous perennials characterized by their rhizomatous growth and upright stems. They feature broad, oval leaves and prominent flowers that include petal-like staminodes along with smaller, colored petals and sepals. These blooms appear in clusters, such as racemes or panicles, during the summer and autumn months.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H3
Plant details
- Plant type
- Conservatory Greenhouse, Herbaceous Perennial
- Habit
- Bushy, Clump forming
- Foliage
- Deciduous
- Height
- 1-1.5 metres
- Spread
- 0.5-1 metres
- Time to full height
- 2-5 years
- Suggested uses
- Architectural, City and courtyard gardens, Patio and container plants, Coastal, Cottage and informal garden, Sub-tropical
Care notes
- Cultivation
- As a patio plant grow in pots of peat-free 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
- Pruning
- Deadhead to promote continued flowering. Leave to dieback in autumn
- Propagation
- Propagate by seed at 21°C (70°F) in spring or autumn. Soak seed in warm water before sowing. Propagate by division in early spring
- Pest resistance
- May be susceptible to aphids, glasshouse red spider mite, slugs and snails and caterpillars
- Disease resistance
- May be susceptible to canna viruses