How to Grow Mexican Sunflower
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Mexican Sunflower
Tithonia rotundifolia
flowerMexican Sunflower is a vibrant annual or tender perennial native to Mexico, known for its brilliant orange-red flowers that resemble sunflowers. It grows as a tall, robust plant with large velvety leaves and blooms prolifically from summer through fall. The flowers are excellent for cutting and attract butterflies and hummingbirds to the garden.
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Example Mexican Sunflower timeline · Pittsburgh, PA (Zone 6b)
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Plant Mexican Sunflower
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Mexican Sunflower blooms
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Mexican Sunflower dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-11 as an annual; perennial in zones 9-11
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Seedling
2-3 weeksSmall plants with 2-4 true leaves, delicate and tender
Keep soil consistently moist but not waterlogged. Provide bright light. Thin seedlings to prevent crowding.
Vegetative Growth
4-6 weeksRapid stem elongation with increasingly large velvety leaves; plant becomes bushy and robust
Water regularly and deeply. Pinch growing tips when 12-18 inches tall to encourage branching. Support tall varieties with stakes if needed.
Budding
2-3 weeksFlower buds appear at stem tips; plants reach full height (3-6 feet depending on variety)
Continue watering and staking support. Begin fertilizing every 2-3 weeks with balanced fertilizer or bloom-boosting formula.
Flowering
8-12 weeksAbundant 2-3 inch orange-red daisy-like flowers with yellow centers blooming continuously
Deadhead spent flowers regularly to encourage more blooms. Water during dry spells. Fertilize every 2 weeks.
Late Bloom & Seed Production
Until first hard frostFlowering continues but slows as temperatures drop; seed heads develop if flowers aren't deadheaded
Allow some flowers to remain for seed collection if desired. Reduce watering in fall. Cut back after frost.
Common Pests
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Spray with water to dislodge; use neem oil or insecticidal soap if infestation is severe. Increase humidity around plants.
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Use yellow sticky traps; spray with insecticidal soap or neem oil. Remove heavily infested leaves.
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Hand-pick if few; apply Bacillus thuringiensis (Bt) for larger infestations.
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Ensure good air circulation. Spray with sulfur dust or fungicide if needed. Avoid overhead watering.
Uses
Edible Flowers
CulinaryThe petals are edible with a slightly spicy flavor and can be used as a garnish for salads and desserts or as a colorful addition to herbal teas. [source]
Pollinator Magnet
WildlifeExcellent source of nectar and pollen for butterflies, bees, and hummingbirds. Supports late-season pollinators when other flowers are scarce. [source]
Cut Flowers & Arrangements
HouseholdThe vibrant long-lasting blooms are ideal for fresh-cut flower arrangements and add tropical flair to bouquets. [source]
Traditional Herbal Remedy
MedicinalIn traditional Mexican and Central American medicine, Mexican Sunflower is used to make infusions believed to have anti-inflammatory and diuretic properties. [source]
Dried Flowers
CraftThe flowers dry well and retain their color, making them suitable for dried flower arrangements and craft projects. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Cut flowers in early morning for longer vase life. Use sharp pruners and cut just above a leaf node. Flowers last 7-10 days in a vase. For seeds, allow flowers to dry on the plant in late fall, then collect seed heads and dry indoors.
Fun Facts
- 🌱 Mexican Sunflower can grow 3-6 feet tall in a single season, making it one of the fastest-growing annual flowers available.
- 🌱 The plant's large velvety leaves are covered in fine hairs that give them a soft, almost fuzzy appearance, and the leaves can reach 6-8 inches across.
- 🌱 In its native Mexico, Tithonia is known as 'Mexican Sunflower' or 'Árnica Mexicana' and has been used for centuries in traditional medicine and as a natural source of orange dye.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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