Crop Rotation Group
Miscellaneous
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Soil
Any sunny site with good drainage.
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Position
Full sun to partial afternoon shade.
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Frost tolerant
Nasturtiums may survive very light frosts, but they are easily damaged by freezing temperatures.
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Feeding
Mix a light application of a balanced organic fertiliser into the soil prior to planting.
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Companions
Nasturtiums sprawl out over the ground, so they suppress weeds and shade the soil when grown near tall plants like sweet corn, tomatoes or sunflowers.
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Spacing
Single Plants: 30cm (11") each way (minimum)
Rows: 30cm (11") with 30cm (11") row gap (minimum)
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Sow and Plant
Soaking seeds in water overnight prior to planting may speed germination, but nasturtium seeds sprout best when the soil is warm. Poke seeds into the soil about 3 cm deep and 8 cm apart. Thin to 30 cm apart in all directions.
Our Garden Planning Tool can produce a personalised calendar of when to sow, plant and harvest for your area.
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Notes
Nasturtium blossoms, leaves and immature green seed pods are edible.
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Harvesting
Gather nasturtium blossoms in the morning, when they are plumped up with moisture. Snip away the base of each blossom, which may taste bitter.
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Troubleshooting
Nasturtium will often reseed itself in hospitable sites.
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