Nasturtium Growing Guide: Edible Flowers and Easy Care

Nasturtiums (Tropaeolum majus) are cheerful, low-maintenance annuals (perennial in zones 8–11) with umbrella-shaped leaves and vibrant flowers in red, orange, yellow, and pink. Both flowers and leaves are edible, adding a peppery kick to salads and dishes. Trailing types suit hanging baskets and trellises; bushy varieties excel in beds. Native to South America, they thrive in poor soil and full sun, and make excellent companion plants for cucurbits, deterring pests like cucumber beetles and squash vine borers.

Quick Profile

• Genus: Tropaeolum (family Tropaeolaceae)
• Type: Herbaceous flowering annual/perennial
• Light: Full sun (6+ hours); tolerates light shade
• Soil: Well-drained, sandy; avoid rich soil and nitrogen fertilizer
• Water: Deep, infrequent watering; let soil dry between
• USDA Zones: 8–11 (perennial), elsewhere annual
• Propagation: Seeds, basal cuttings
• Edible: Leaves and flowers (peppery flavor)

Growing from Seed

• Large seeds are easy for children to handle. Soak overnight for faster germination (optional).
• Warm regions: Sow spring to early autumn.
• Cool regions: Sow spring after frost danger passes.
• Sow 1 inch deep, rows 12 inches apart. Germination: 7–15 days at 55–65°F soil temp.
• Keep soil surface moist until seedlings emerge.
• Use biodegradable pots to avoid transplant damage; plant pot directly in ground.

Care Tips

• Light: Full sun for best bloom. In hot climates, protect from scorching afternoon sun.
• Soil/Fertilizer: Poor to average soil produces more flowers. Rich soil or nitrogen fertilizer yields lush foliage but few blooms. Do not fertilize during growing season.
• Water: Deep water 2×/week if no rain. Check soil moisture before watering. Morning watering preferred. Yellow leaves often indicate overwatering.
• Pests: Aphids may appear. Blast with water, wipe with soapy solution, or remove manually.
• Diseases: Mold/fungus in damp conditions. Ensure good air circulation.

Companion Planting

Plant near pumpkins, squash, cucumbers to repel pests with peppery foliage. Nasturtiums also attract beneficial insects.

Simple, beautiful, and useful—nasturtiums are a must-have for edible and ornamental gardens alike.