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PlantSnap
Plant Care
Garden cosmos
(Cosmos bipinnatus)
Also Known As
Garden cosmos, Mexican aster, Cosmos
About This Plant
Cosmos bipinnatus is an annual plant species native to Mexico. It has delicate fern-like leaves and produces showy, daisy-like flowers in shades of pink, white, and crimson. The plant can grow up to 4 feet (122 cm) tall and 2 feet (61 cm) wide.
Plant Care Instructions
Outdoor Size Range
24-48 inches (61-122 cm) tall, 12-24 inches (30-61 cm) wide
Light Requirements
Cosmos bipinnatus requires full sun to grow and flower properly. It needs at least 6 hours of direct sunlight per day.
Humidity Needs
Cosmos bipinnatus can tolerate a wide range of humidity levels, but it prefers moderate humidity.
Fertilizing Schedule
The plant does not require much fertilizer, but it can benefit from a balanced fertilizer applied every 4-6 weeks during the growing season.
Pruning Guidelines
Cosmos bipinnatus does not require pruning, but deadheading spent flowers can encourage more blooms.
Common Pests and Diseases
Common pests and diseases for Cosmos bipinnatus include aphids, spider mites, and powdery mildew.
Indoor Size Range
Not suitable for indoor growing
Watering Schedule
The plant prefers well-drained soil and moderate watering. It should be watered deeply once a week, or more often in hot and dry weather.
Temperature Range
The plant can tolerate a wide range of temperatures, but it grows best in temperatures between 60-70°F (15-21°C).
Growing Season
The growing season for Cosmos bipinnatus is from early summer to fall.
Growing Difficulty Level
Cosmos bipinnatus is easy to grow and is a great choice for beginner gardeners.
USDA Hardiness Zones
Cosmos bipinnatus can be grown in USDA hardiness zones 2-11.
Did You Know?
Cosmos bipinnatus is also known as the 'Garden Cosmos' and is a popular choice for cut flower arrangements due to its long stems and colorful blooms.
