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Whorled Rosin Weed

Silphium trifoliatum

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Category
Forb / Wildflower
Sun
Full to Partial
Soil moisture
Medium to Medium-Dry
Bloom time
Jul–Sep
Bloom color
Yellow

About Whorled Rosin Weed

Whorled Rosin Weed is an elegant and refined member of the Silphium family, distinguished by its smooth stems and leaves that typically grow in tidy whorls of three or four. Standing between three and six feet tall, it produces a lovely display of yellow, daisy-like flowers from July into early autumn. This species is native to the eastern United States, where it is often found in open woodlands, savannas, and prairie edges. Its manageable size and attractive foliage make it a versatile choice for both formal native gardens and naturalized meadows. Whorled Rosin Weed is highly attractive to a variety of pollinators, including butterflies and long-tongued bees, yet it remains notably deer-resistant compared to other garden perennials. It performs best in full to partial sun and prefers average, well-drained soils. With its structural beauty and late-season bloom period, it serves as an excellent transitional plant between wooded areas and open sunny spaces, providing consistent color and wildlife support.

Native range

Native to 17 states:

AlabamaD.C.GeorgiaIllinoisIndianaKentuckyLouisianaMarylandMississippiNorth CarolinaNew YorkOhioPennsylvaniaSouth CarolinaTennesseeVirginiaWest Virginia

County range map

BONAP county-level native range map for Silphium trifoliatum

Range map courtesy of BONAP (Biota of North America Program).

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