Nasturtium
cool-season crop
At a glance
| Suitable zone groups | All four zone groups (3-4, 5-6, 7-8, 9-10), as a cool-season annual |
|---|---|
| Planting window | See the guide text below, in general terms relative to your last spring frost |
| Sun | Full sun to partial shade |
| Soil | Well-draining soil, tolerates poor soil |
| Watering | Moderate watering |
About this plant
Nasturtium has rounded leaves and colorful flowers that suit borders and containers. It grows as a cool-season annual in all four zone groups (3-4, 5-6, 7-8, 9-10), in full sun to partial shade.
Use well-draining soil; poor soil is acceptable for this plant. Provide moderate watering and choose a trailing or compact variety to fit the space you have.
Common beginner failures and fixes
- Lots of leaves but few flowers after feeding: Stop unnecessary fertilizer and avoid overly rich planting mixes.
- Roots staying wet: Improve drainage or use a container that lets excess water escape.
- Trailing stems crowding a path: Guide them back into the bed or choose a compact variety next time.
- Plants struggling during hot weather: Plan your planting for the cool season and use the partial-shade option where appropriate.
Beginner checklist
- Plan a cool-season annual planting for your zone group.
- Choose full sun to partial shade.
- Use well-draining soil; poor soil is acceptable.
- Provide moderate watering.
- Match the growth habit to your bed or container.
Zone groups and planting windows here are general guidance. Confirm your own zone and last frost date locally before planting.