University of Wisconsin-Madison | Botany Plant Growth Facilities

Botanical Garden

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Genus: Oenothera Species: fruticosa Common Name: Sundrops Family: Onagraceae Order: Myrtales Native: Eastern United States Habit: Herbaceous Perennial Height: 1 to 3 feet Width: 1 to 1.5 feet Flowering Season: Spring to Summer Flower Color: Yellow Propagation: Seed or division Zone: 4-9 Note: This plant is suitable for perennial borders. Flowers of Sundrops open only during the daylight hours. Prefers sunny to partly shady, moderately dry, well-drained ordinary garden soil.