How to Grow Mexican Sunflower Red Carpet

Mexican Sunflower Red Carpet

Tithonia rotundifolia 'Red Carpet'

flower

A compact cultivar of Mexican Sunflower that grows 2-3 feet tall and produces vibrant orange-red flowers from summer through fall. This bushy annual thrives in hot, sunny conditions and attracts pollinators while tolerating poor soil and drought stress exceptionally well.

Growing Conditions

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Sun: Full sun, 6-8 hours daily (prefers 8+ hours for best flowering)

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Water: Moderate to low water needs once established; drought tolerant. Water deeply during establishment, then reduce frequency. Overwatering may promote foliage at the expense of flowers.

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Spacing: 18-24 inches

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Days to maturity: 60-90 days to first flowers

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Planting depth: 0.25 inches (direct seed); transplants at soil level

Soil

Type: Well-draining, sandy or loamy soil; tolerates poor, infertile soil

pH: 6.0-7.5

Amendments:

Compost for initial planting Minimal fertilizer needed—excessive nitrogen reduces flowering

Growing Zones

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Grows as an annual in zones 2-8; perennial in zones 9-11

2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b

Growth Stages

Seedling

2-3 weeks

Emerges with oval cotyledons followed by soft, slightly hairy true leaves. Plant is tender and low-growing.

Keep soil consistently moist but not waterlogged. Provide bright light indoors if starting seeds. Harden off before transplanting outdoors.

Vegetative Growth

3-4 weeks

Plant develops multiple stems and increasingly large, coarse green foliage. Stems become woody and sturdy; plant fills out horizontally into a bushy mound.

Pinch growing tips early (before 6 inches tall) to encourage branching and compact form. Reduce watering as plant matures. Fertilize lightly if needed.

Budding

2-3 weeks

Terminal flower buds appear on branch tips; buds are deep orange-red and tightly clustered, about 1 inch in diameter.

Stop pinching. Maintain consistent watering during bud development. Do not overwater—this can cause bud drop. Reduce nitrogen fertilizer.

Flowering

8-12 weeks until frost

Large (2-3 inch), semi-double orange-red flowers open with prominent central disk of yellow stamens. Multiple flowers bloom sequentially from mid-summer through first frost.

Deadhead spent flowers to encourage continuous blooming. Water deeply but infrequently. Avoid overhead watering which wets flowers. Very heat-tolerant at this stage.

Seed Production

Until frost

If flowers are not deadheaded, they mature into distinctive round, spiky seed heads that resemble small thistles. Seeds are ready when heads turn brown and dry.

Allow flowers to mature if saving seed for next year. Seed heads can be dried and stored in cool, dry conditions. Let some seed heads remain on plant for late-season pollinators.

Companion Planting

Plan your garden →

Plant with:

Zinnias Cosmos Marigolds Salvias Artemisia Lavender Coreopsis Rudbeckia

Avoid planting near:

Vegetables in intensive vegetable gardens (allelopathic tendencies) Brassicas Beans

Common Pests

Spray with insecticidal soap or neem oil; strong water spray can dislodge them. Most damage is cosmetic and rarely warrants treatment.
Increase humidity and spray with water; use neem oil or miticide if infestation is severe. Mites prefer dry conditions.
Handpick caterpillars if present; encourage beneficial wasps. Rarely a major problem on tithonia.
Improve air circulation; avoid overhead watering. Apply sulfur dust or neem oil at first signs. Most resistant to disease when adequately spaced.

Uses

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Edible Flowers

Culinary

Petals are edible with a slightly spicy, peppery flavor and are used as a garnish in salads and cocktails. The flowers have been traditionally used in Mexican cuisine. [source]

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Traditional Medicine

Medicinal

In traditional Mexican and Central American medicine, Mexican Sunflower has been used to treat wounds, inflammation, and respiratory conditions. Modern research is investigating its phytochemical compounds. [source]

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Pollinator Support

Wildlife

Flowers are highly attractive to bees, butterflies, and hummingbirds. The abundant nectar and pollen make it an excellent late-summer and fall resource when other blooms are fading. [source]

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Cut Flower Arrangements

Household

The long stems and bold orange-red blooms make excellent cut flowers for fresh arrangements. Dried seed heads also add interesting texture to dried arrangements. [source]

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Dried Arrangements & Seed Saving

Craft

Spiky seed heads dry beautifully for dried flower arrangements and wreaths. Seeds are prolific and can be easily saved and shared for next season's garden. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Deadhead flowers regularly throughout the season (snip just below the flower head) to extend blooming. For cut flowers, harvest in early morning when stems are turgid; flowers last 5-7 days in water. To save seeds, allow late-season flowers to mature fully; cut dry seed heads in fall and strip seeds into paper envelopes for winter storage.

Fun Facts

🌱 Mexican Sunflower is not a true sunflower but was named for its resemblance to sunflowers; it's native to Mexico and Central America and has been grown there for centuries.
🌱 The 'Red Carpet' cultivar is significantly more compact than the species type, growing only 2-3 feet tall versus 4-6 feet, making it ideal for smaller spaces and containers.
🌱 This plant is so drought-tolerant and self-sufficient that it's sometimes considered weedy in warm climates; it thrives in poor, neglected garden spots where other plants struggle.

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