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First Impression: Silphium mohrii is a striking perennial that commands attention with its bold presence and distinctive features. Commonly known as Mohr’s Rosinweed, this native wildflower is a must-have for any garden seeking a touch of prairie elegance. With a statuesque height reaching up to 5 feet, and fuzzy stems and leaves Silphium mohrii stands tall as a beacon of golden beauty, creating a focal point in your landscape.

Habitat & Hardiness: Mohr’s Rosinweed is found naturally only in regions of Alabama, Tennessee and Georgia in tallgrass prairie ecosystems, grasslands and meadows, roadsides and disturbed areas and woodland edges. These species is hardy in USDA Zones 5-8.

Plant Description: The large, sunflower-like blooms of Mohr’s Rosinweed are a radiant burst of sunshine, each flower boasting vibrant yellow petals that effortlessly attract pollinators like bees and butterflies. Flowering from mid to late summer, this perennial extends the blooming season, offering a late-season feast for beneficial insects. The deeply lobed, lance-shaped leaves add a rich, green backdrop to the golden floral display, creating a harmonious balance in the garden.

Silphium mohrii is not only a visual delight but also a hardy and resilient addition to your garden. Thriving in full sun and well-drained soils, this native beauty is adapted to a range of climates and soil types. Its robust nature makes it a low-maintenance choice for both experienced gardeners and those just starting their horticultural journey. Whether planted as a standalone specimen or incorporated into perennial borders and prairie-style landscapes, Silphium mohrii brings a touch of the wild to your garden sanctuary.

Cultural & Maintenance Needs: Once established, Mohr’s Rosinweed is a low maintenance addition to the garden and will thrive if given full sun to part sun conditions and well-drained soils.

Landscape Uses: Incorporate Silphium mohrii into pollinator gardens, cottage gardens, wildlife gardens, perennial borders, rain gardens, cut flower gardens, prairies and meadows. This species is a suitable addition to drought-tolerant gardens, low-maintenance landscapes, and deer resistant plantings. Beneficial Insects; Bird Garden; Butterfly Garden; Cottage Garden; Cut/Dried Flower Garden; Deer Resistant Plantings; Erosion Control; Low Maintenance Gardens; Mass/Group Planting; Meadow/Prairie; Native Plant Garden;Naturalizing;Perennial Borders; Pollinator Garden; Rain Garden / Stormwater Management; Fragrance Garden; Restoration/Conservation.

Ecological Benefits: Mohr’s Rosinweed, like other Silphium species support the caterpillars of some. butterflies and moths. The flowers attract butterflies such as swallowtails, fritillaries and skippers and bees. The seeds are valuable to various bird species including finches and sparrows.

Companion/Understudy Plants: Try pairing Mohr’s Rosinweed with Rudbeckia fulgida; Physostegia virginiana ‘Vivid’; Physostegia virginiana; Echinacea purpurea; Liatris spicata; Monarda didyma, Monarda fistulosa; Rudbeckia hirta; Asclepias tuberosa; Schizachyrium scoparium; Monarda didyma ‘Jacob Cline’; Monarda punctata; Baptisia australis; Aster novae-angliae; Aster laevis; Aster ericoides ‘Snow Flurry’; Aster ericoides; Panicum virgatum; Andropgon gerardii; and Muhlenbergia capillaris depending on design goals and the site’s cultural conditions. If Silphium mohrii is not available Silphium laciniatum, Silphium perfoliatum and Silphium terebinthinceum may be suitable substitutes depending design goals and the cultural conditions of the site. Additionally, you may find Ratibida pinnata; Eryngium yuccifolium; Asclepias tuberosa; Heliopsis helianthoides; Solidago rugosa and Solidago speciosa as good alternatives.