Annual flower
Mexican Sunflower plant profile
Tithonia rotundifolia
An annual flower for full sun.
Last updated .
When to plant
When to plant Mexican Sunflower
Direct sow
at your last spring frost to 2 weeks after your last spring frost
Growing conditions
- Sun
- Full sun
- Lifecycle
- Annual
Common problems
Watch for these
Also watch for: needs staking when tall, self seeding.
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Tithonia rotundifolia (Mexican Sunflower)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports direct-sowing timing (normalized). Checked 2026-06-18.