Genus: Nasturtium

Tropaeolum

Photo/Illustration: 
Michelle Gervais
Nasturtium (Tropaeolum)
troe-pay-OH-lum
Tropaeolaceae
These annuals and tender perennials are native to Central and South America. Their leaves are notably round, palmately-lobed, or palmate. The spurred flowers are widely funnelled, with five petals that are curiously fringed or lobed. Some species are bushy or trailing, and they are suitable for garden edges, herb gardens, covering banks, hanging baskets, and other containers. The leaves and flowers of the annuals are edible.
Noteworthy characteristics:  The genus offers species with distinctly-shaped leaves and showy blossoms, all uniquely shaped and saturated with color.
Care:  Generally, grow in moist, well-drained soil in full sun (see individual species for detailed information). Tender species may be grown as border plants and stored indoors in winter with minimal moisture while dormant. Under glass, provide with full light and shade from direct sun. Note: some species are summer-dormant.
Propagation: 

Sow annual seeds in early spring, or in situ in midspring. Sow seeds of perennials in a cold frame when fresh. Divide tubers when dormant in autumn, and of <em>T. speciosum</em> in early spring. Root stem cuttings with bottom heat in late summer.

Problems: 

Caterpillars, flea beetles, black aphids, slugs, whiteflies, viruses.

Species, varieties and clutivars for genus Tropaeolum

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Indian cress
Tropaeolum majus 'Alaska Mix'
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Indian cress
Tropaeolum majus 'Dwarf Cherry Rose'
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Indian cress
Tropaeolum majus 'Empress of India'
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Indian cress
Tropaeolum majus 'Jewel of Africa'
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Indian cress
Tropaeolum majus 'Mahogany Jewel'
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Indian cress
Tropaeolum majus 'Milk Maid'
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Indian cress
Tropaeolum majus 'Peach Melba'
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Indian cress
Tropaeolum majus 'Strawberries and Cream'
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Indian cress
Tropaeolum majus 'Vanilla Berry'
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Indian cress
Tropaeolum majus 'Vesuvius'
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Indian cress
Tropaeolum majus 'Whirlybird Mix'
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Canary creeper
Tropaeolum peregrinum
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Flame nasturtium
Tropaeolum speciosum