Annual flower
Nasturtium plant profile
Tropaeolum majus
An annual flower for full sun.
Last updated .
When to plant
When to plant Nasturtium
Start seeds indoors
6 weeks before your last spring frost to 4 weeks before your last spring frost
Direct sow
at your last spring frost to 2 weeks after your last spring frost
Growing conditions
- Sun
- Full sun
- Planting depth
- 0.5 in
- Lifecycle
- Annual
- Spacing
- 10 to 12 in apart
Common problems
Watch for these
Also watch for: imported cabbageworm, leafminers.
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Nasturtium, Tropaeolum majus
University of Wisconsin-Madison Division of Extension (Wisconsin Horticulture). Supports indoor seed-starting timing (direct) and direct-sowing timing (normalized). Checked 2026-06-13.
- Toxic and Non-Toxic Plants: Nasturtium (Tropaeolum majus) entry
ASPCA Animal Poison Control Center. Supports pet-safety verdicts for dogs and cats. Checked 2026-07-18.