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Climber Wall ShrubConservatory Greenhouse

Tropaeolum tricolor
  • RHS AGM

three-coloured nasturtium

T. tricolor is a summer-dormant, tuberous, perennial climber to about 1.5m with small, light green, five- or seven-lobed leaves. The small, yellow flowers are surrounded by a showy purple-tipped, orange-red calyx with a long red or purple spur, in all about 3cm long. Flowering takes place from winter to early summer

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Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Loam
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Purple Red Yellow Green
Summer
Autumn Green
Winter Purple Red Yellow Green
Position
  • Full sun
Aspect

West–facing or South–facing

Exposure
Sheltered
Hardiness
H2
Botanical details
Family
Tropaeolaceae
Native to the UK
No
Foliage
Deciduous
Habit
Climbing
Genus

Tropaeolum can be annuals or perennials, bushy, trailing or climbing by twining stems, with simple or palmately lobed leaves and showy funnel-shaped flowers with five long-clawed petals and often a spur

Name status

Correct

Plant range
Chile

How to grow

Cultivation

Grow under glass in good light with shade from hot sun. Plant tubers in a deep container of loam-based compost with added fine grit, starting into growth in autumn

Propagation

Propagate by separating tubers when dormant in summer

Suggested planting locations and garden types
  • Patio and container plants
  • Wall side borders
Pruning

No pruning needed - allow to die down naturally in midsummer

Pests

No particular susceptibilities, but can suffer usual greenhouse pests such as glasshouse whitefly and glasshouse red spider mite

Diseases

Normally disease free

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