5 Seeds Tithonia diversifolia Giant Sunflower Tree

Tithonia diversifolia, commonly known as the Giant Sunflower Tree or Mexican Sunflower, brings bold, vibrant golden-orange blooms to your garden from summer through fall. This fast-growing, shrubby perennial is a standout for sunny borders, adding a wild, tropical feel with its large, daisy-like flowers that attract beneficial pollinators. Each seed is selected for strong germination, producing plants that grow upright and enthusiastic in any warm, sunny spot.
This versatile plant works beautifully as a fast-growing ornamental screen or a striking backdrop in cottage and pollinator gardens. Its generous bloom count delivers steady color and natural structure, while its tolerance for poor soils makes it an easy choice for low-maintenance landscapes. For best results, plant in rich, well-draining soil and water during dry spells to encourage the most vigorous display. Species: Tithonia diversifolia
Variety: Giant Sunflower Tree
Type: Perennial (often grown as annual in cooler zones)
Plant Habit: Upright, bushy shrub-like
Sun: Full sun
Soil: Well-draining, adaptable to average to poor soils
Days to Harvest: N/A (flowering from mid-summer)
Zones: 8-11 (perennial), 3-7 (annual)
Germination: 10-21 days at 70-75°F
Sowing: Start seeds indoors 4-6 weeks before last frost, or direct sow after frost risk
Spacing: 24-36 inches apart
Notes: Grows 6-10 feet tall; cut back in late winter in warm zones