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PlantSnap
Plant Care
Mexican sunflower
(Tithonia rotundifolia)
Also Known As
Mexican sunflower, Tree marigold, Ramblin' rose
About This Plant
Tithonia rotundifolia is a species of flowering plant in the family Asteraceae. It is native to Mexico and Central America, but is cultivated worldwide as an ornamental plant for its bright orange or yellow flowers.
Plant Care Instructions
Outdoor Size Range
36-48 inches (91-122 cm) tall, 18-24 inches (46-61 cm) wide
Light Requirements
Mexican sunflowers require full sun to thrive and should be placed in an area that receives at least 6 hours of direct sunlight per day.
Humidity Needs
Mexican sunflowers prefer average to low humidity levels.
Fertilizing Schedule
Fertilize the plant once a month during the growing season with a balanced fertilizer.
Pruning Guidelines
Pinch back the tips of the plant to encourage bushier growth and deadhead spent flowers to promote more blooms.
Common Pests and Diseases
Mexican sunflowers are relatively pest-free, but can be susceptible to aphids and spider mites.
Indoor Size Range
Not suitable for indoor growth
Watering Schedule
Water the Tithonia rotundifolia deeply once a week during the growing season, and reduce watering during the winter months. Do not overwater, as this can cause root rot.
Temperature Range
Tithonia rotundifolia prefers warm temperatures between 70-85°F (21-29°C).
Growing Season
Mexican sunflowers are annuals and grow best during the summer months.
Growing Difficulty Level
Tithonia rotundifolia is an easy plant to grow and care for, making it a great choice for beginner gardeners.
USDA Hardiness Zones
Tithonia rotundifolia is not frost-tolerant and grows best in USDA hardiness zones 9-11.
Did You Know?
The Tithonia rotundifolia plant is commonly used in traditional medicine to treat a variety of ailments, including respiratory infections and skin conditions.
