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Mexican Sunflower

Tithonia rotundifolia. This drought-tolerant, heat-loving wonder is a large, almost shrub-like plant that produces abundant flowers. It is best started directly in the garden, although it may also be started indoors 6 to 8 weeks prior to setting out after all threat of frost has passed in spring. Staking may be required. A fabulous display annual, it is also a good cutting flower. Mexican Sunflower's hollow stems should be flame-seared before being added to extravagant summer bouquets to prevent wilting. Annual. Summer flowering. Height: 36" to 48".

Average seed life: 1 to 2 years.

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Gardening Tips

Mexican Sunflower Sowing Instructions
Planting Depth
:1/8”
Seed Spacing:6”-8”
Plant Spacing:24”
Days to Germination:5-10 days
Germination Temperature:65°-75°F

Tithonia rotundifolia. Mexican Sunflower can be direct-sown into the garden or started indoors 6 to 8 weeks before transplanting out after the threat of frost has passed. Prepare bed in full sunlight with rich, well-draining soil. Sow seeds in good seedstarting medium at 70°F with even moisture, strong light and good ventilation. For consistent moisture during germination, cover flats or pots with plastic wrap until seedlings emerge: then discard plastic. Harden off seedlings by gradually acclimating them to outside conditions for 1 to 2 weeks before transplanting out. Thin or transplant the seedlings 24" apart. Drought-tolerant, this heat-lover requires good drainage and dislikes excessive watering. This imperious scarlet-orange beauty may need staking. A terrific cut flower, cut ends must be flame-seared to prevent wilting. Summer flowering. Height: 36" to 48".