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Silphium mohrii

Native Plants

Mohr’s Rosinweed

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With large basal, lance-shaped foliage, a clump-forming habit and numerous pale yellow flowers, Mohr’s rosinweed (Silphium mohrii) adds a bold statement to the perennial border or naturalized planting. Basal leaves are 10-15” long, gradually becoming smaller as they ascend the stems. Both leaves and stems are covered with dense, fine, bristly hairs. The 2” wide flowers are slightly fragrant and borne on erect, 2-5’ tall stems that branch near the top. Full sun is best but plants will tolerate light shade and prefer a rocky to gravelly, well-drained soil with low fertility. Combined with black-eyed Susan (Rudbeckia fulgida), Vivid obedient-plant (Physostegia virginiana ‘Vivid’), and prairie wood-aster (Eurybia hemispherica), Mohr’s rosinweed  adds an architectural element to a meadow planting. Zones 5-8. 

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