About
Canna 'City of Portland' is an upright perennial that typically reaches heights of 1.2 to 1.5 meters. It features broad, paddle-like leaves in a medium green hue. From midsummer through autumn, it produces plentiful upright clusters of vibrant salmon pink blossoms, each with a yellow throat and a delicate yellow border.
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
- 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, Coastal, Cottage and informal garden, Patio and container plants
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
- No pruning required but deadhead to promote continued flowering
- Propagation
- Propagate by division of the rhizomes in spring
- Pest resistance
- May be susceptible to glasshouse red spider mite, aphids, slugs and snails
- Disease resistance
- May be susceptible to canna viruses