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PlantSnap
Plant Care
Common sunflower
(Helianthus annuus)
Also Known As
Common sunflower, Garden sunflower, Annual sunflower, American sunflower
About This Plant
Helianthus annuus is a species of sunflower, native to North America, that can grow up to 10 feet (3 meters) tall with a flower head that can be up to 1 foot (30 cm) in diameter. It is an annual plant that is widely cultivated for its edible seeds and oil. The leaves are broad, ovate, and rough to the touch, while the flowers are bright yellow with brown centers.
Plant Care Instructions
Outdoor Size Range
Height: 3-10 feet (0.9-3 meters), Width: 1-3 feet (0.3-0.9 meters)
Light Requirements
Full sun for at least 6 hours a day.
Humidity Needs
Does not require high humidity.
Fertilizing Schedule
Fertilize every 2-3 weeks with a balanced fertilizer.
Pruning Guidelines
Pinch back the growing tips when the plant is 1-2 feet (0.3-0.6 meters) tall to encourage bushier growth.
Common Pests and Diseases
Common pests include aphids, caterpillars, and spider mites.
Indoor Size Range
Not suitable for indoor cultivation
Watering Schedule
Water regularly, keeping the soil moist but not waterlogged.
Temperature Range
Prefers warm temperatures between 70-78°F (21-26°C).
Growing Season
Summer to fall.
Growing Difficulty Level
Easy to grow.
USDA Hardiness Zones
3-9
Did You Know?
The sunflower is not a single flower, but a cluster of thousands of tiny flowers, which makes it a composite flower.
