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Tithonia diversifolia
species; tender perennial shrub in frost free climates
At‑a‑glance
- Group/Class: species; tender perennial shrub in frost free climates
- Height x spread: 6 to 10 ft (1.8 to 3 m) x 6 to 10 ft (1.8 to 3 m)
- Bloom window: late fall to winter; December to June in some subtropics
- Color & flower form: yellow daisylike heads 2 to 6 in (5 to 15 cm) across
- Fragrance: 1 trace (honey scented)
- USDA hardiness: grown as tender perennial only in frost free areas; otherwise annual or die back; varies by climate
- Breeder / Year / Origin: unknown, unknown, Mexico and Central America
- Pet safety: unknown
How it differs
- Taller and woodier than the common annual Mexican sunflower.
- Yellow flowers instead of orange red tones.
- Cool season bloom in frost free zones.
Strengths
- Very fast growth and large biomass.
- Long bloom in frost free climates.
- Attractive to pollinators.
Care in one minute
Plant in full sun with ample space and well drained soil.
Water to establish; then deep water during dry spells.
Avoid heavy feeding; prune after bloom to manage size.
Remove spent heads promptly to limit spread.
Watch‑outs
- High invasion risk in Florida; check local guidance before planting.
- Can outgrow small spaces and become weedy.
- Frost kills top growth; entire plant may be lost in freezes.
Best uses (tags)
Provenance note
Native to Mexico and Central America. Widely introduced for ornament and biomass; now naturalized and invasive in many tropical and subtropical regions.
References
- UF/IFAS Assessment – Tithonia diversifolia (High Invasion Risk)
- North Carolina Botanic Garden (FSUS) – Tithonia diversifolia
- CABI Compendium – Tithonia diversifolia
- NParks Singapore – Tithonia diversifolia profile
