University of Wisconsin-Madison | Botany Plant Growth Facilities

Botanical Garden

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Genus: Helianthus Species: annuus Common Name: Common Sunflower Family: Asteraceae Order: Asterales Native: Central North America Habit: Annual Height: 2 to 10 feet Width: 1.5 to 3 feet Flowering Season: Summer Flower Color: Yellow ray flowers and brown to purple disk flowers Propagation: Seed Note: Sunflower seeds are edible and rich in oil. This plant is suitable for containers, borders, and cottage, cut, bird or wildflower gardens. Tall varieties need staking. Monitor plant regularly for leaf spot, powdery mildew, rust, caterpillars and beetles. Prefers sunny, moist, ordinary garden soil.