Nasturtium
Tropaeolum majus
Nasturtium is the classic 'trap crop' — aphids preferentially attack nasturtium over neighbouring vegetables, so planting it as a sacrificial border around tomatoes and cucumbers genuinely reduces pest pressure on the main crop.
How to care for nasturtium
Sow direct after frost — large seeds are easy to space and germinate in 7-10 days. Loves poor soil; rich soil produces all leaves and no flowers. Both leaves and flowers are edible and peppery (like watercress).
Garden uses & design ideas
Best garden use
Use it where you want fast seasonal color in containers, walkway edges, or gaps between slower permanent plants.
Pair it with
Tomato, Cucumber, Squash make easy companion choices because they share similar light, water, or visual texture needs.
Layout tip
Match it with full sun exposure, group it with other low-water plants so one irrigation zone can stay lean, and check USDA zones 2-11 (annual everywhere; perennial only in zone 10+) before planting. Use the garden planner to test spacing around its mature size: 12 in (bush) or 6-10 ft (climbing).
Gardener note — Double-check local invasive, edible, and toxicity guidance with your county extension office before planting around pets, children, or natural areas.
Companion plants
Nasturtium grows well alongside these — similar light, water, and texture needs.
Common pests & problems
Where it grows best
Native to South American Andes (Peru, Bolivia); thrives in USDA hardiness zones 2-11 (annual everywhere; perennial only in zone 10+).
Frequently asked about nasturtium
What USDA zones does Nasturtium grow in?+
Nasturtium is hardy in USDA zones 2-11 (annual everywhere; perennial only in zone 10+). Outside these zones, it can usually be grown indoors or as a seasonal annual.
How much sun does Nasturtium need?+
Nasturtium prefers full sun. Place it where it gets that light most of the day for best growth and flowering.
How often should I water Nasturtium?+
Nasturtium has low water needs. Allow the soil to dry between waterings. Sow direct after frost — large seeds are easy to space and germinate in 7-10 days. Loves poor soil; rich soil produces all leaves and no flowers. Both leaves and flowers are edible and peppery (like watercress).
How big does Nasturtium get?+
Nasturtium reaches a mature size of 12 in (bush) or 6-10 ft (climbing). Growth rate is fast, so plan spacing accordingly when planting.
What plants grow well with Nasturtium?+
Nasturtium pairs well with Tomato, Cucumber, Squash, Radish, Cabbage. These companions share similar care requirements and don't compete aggressively for resources.
What pests affect Nasturtium?+
Common Nasturtium problems include aphids (acts as trap crop — aphids prefer nasturtium over tomatoes). Catching early signs in routine inspection prevents most damage.
When does Nasturtium bloom?+
Nasturtium blooms in early summer to first frost in orange, yellow, red, mahogany, cream. Deadheading spent flowers (where applicable) often encourages a longer bloom window.
Design a garden with nasturtium in minutes
Drag plants into a 3D space, walk through it, or upload a photo and let AI redesign it. Test spacing around its mature size before you plant.
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