Silphium integrifolium

Rosin Weed (Silphium integrifolium) is a perennial herb native to North American prairies, known for its tall, upright growth habit and sunflower-like yellow blooms. It typically reaches heights of 3 to 6 feet and features coarse, hairy stems with large, lance-shaped leaves. Rosin Weed thrives in full sun and prefers well-drained soils, but it can tolerate a range of soil types. It does best with medium moisture but is also somewhat drought-tolerant once established. This plant is valued for attracting native bees and other pollinators, making it a great addition to prairie restorations and wildflower gardens.

Native range

Great PlainsNative here

Bloom time

July – September

Garden location

West Driveway Bed