GardenWizzPlant Care Card

Nasturtium

Tropaeolum majus · Annual

Hardiness
H3 Half-hardy (to −5 to 1°C)
Position
Full sun
Height × Spread
30–180 cm × 45 cm
Soil
poor, well-drained soil
Flowering
June–October
Toxicity
Non-toxic; the leaves, flowers and seeds are all edible, with a peppery, cress-like flavour, commonly used in salads.

The Gardening Year

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F
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A
M
J
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🌱 Sow
🪴 Plant out
🌸 In flower

Watch out for

Aphids (Blackfly): Squash by hand, blast off with water, or use a plant-based insecticide if severe.

Whitefly: Use yellow sticky traps and spray with horticultural oil or insecticidal soap.

Red spider mite: Keep plants well-watered and spray with a miticide or horticultural oil.

Viral infection: Remove and destroy infected plants immediately to prevent spread via aphids.

Slugs and snails: Use beer traps, copper tape barriers, or iron phosphate-based pellets.

Full guide: gardenwizz.com/plants/tropaeolum-majus © GardenWizz — UK gardening encyclopedia