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PlantSnap
Plant Care
Sulfur cosmos
(Cosmos sulphureus)
Also Known As
Sulfur cosmos, Yellow cosmos, Golden cosmos
About This Plant
Cosmos sulphureus is a species of cosmos native to Mexico and northern South America. It is an annual plant with bright orange to yellow flowers that bloom in the summer and fall. The plant can grow up to 3 feet (91 cm) tall and 2 feet (61 cm) wide.
Plant Care Instructions
Outdoor Size Range
Height: 1-3 feet (30-91 cm), Width: 1-2 feet (30-61 cm)
Light Requirements
Cosmos sulphureus requires full sun to partial shade to grow properly. It needs at least 6 hours of direct sunlight per day.
Humidity Needs
Cosmos sulphureus can tolerate low humidity levels and does not require any special humidity conditions to grow.
Fertilizing Schedule
The plant benefits from regular fertilization during the growing season. Use a balanced fertilizer every two weeks to promote healthy growth and flowering.
Pruning Guidelines
Prune the plant regularly to encourage bushier growth and more flowers. Deadhead spent blooms to prolong blooming.
Common Pests and Diseases
Common pests for Cosmos sulphureus include aphids, spider mites, and whiteflies. Diseases that can affect the plant include powdery mildew and leaf spot.
Indoor Size Range
Not suitable for indoor growth.
Watering Schedule
The plant prefers well-draining soil and moderate watering. Water the plant when the top 1-2 inches of soil are dry to the touch.
Temperature Range
The plant can tolerate a wide range of temperatures, from 50°F (10°C) to 85°F (29°C).
Growing Season
Cosmos sulphureus grows best in the summer and fall.
Growing Difficulty Level
Cosmos sulphureus is easy to grow and maintain, making it a great choice for beginner gardeners.
USDA Hardiness Zones
Cosmos sulphureus is hardy in USDA zones 9-11.
Did You Know?
In some cultures, Cosmos sulphureus is believed to have medicinal properties and is used to treat various ailments such as fever and diarrhea.
