Nasturtium Growing Guide

Soil

Any sunny site with good drainage.

Position

Full sun to partial afternoon shade.

Frost tolerant

Nasturtiums may survive very light frosts, but they are easily damaged by freezing temperatures.

Feeding

Mix a light application of a balanced organic fertilizer into the soil prior to planting.

Companions

Apple, Beans, Cabbage, Kale, Broccoli, Potatoes, Pumpkin, Radish, Squash, Corn, Tomato and Sunflower. 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.

Spacing

Single Plants: 11″ (30cm) each way (minimum)
Rows: 11″ (30cm) with 11″ (30cm) row gap (minimum)

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 1 inch (3 cm) deep and 3 inches (8 cm) apart. Thin to 12 inches (30 cm) apart in all directions.

Notes

Nasturtium blossoms, leaves and immature green seed pods are edible.

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.

Troubleshooting

Nasturtium will often reseed itself in hospitable sites.