Silphium integrifolium
Common name: Rosin Weed
Rosin Weed is a tall, upright prairie plant that produces branching clusters of large yellow, sunflower-like flowers at the tip of a central stalk. Blooming occurs late summer to early fall and lasts 1 to 2 months. Although it can reach heights of nearly 6 feet, it usually stays around 3 to 4 feet tall. Rosin Weed is shorter than the other native Silphium species. Its flowers attract a range of pollinators, and its seeds are a food source for the occasional Goldfinch.
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Plant Details
Plant type
Forbs
Soil type
Dry, Dry Mesic, Mesic (Not too Wet Not too Dry), Moist Mesic
Light exposure
Full Sun, Partial Sun / Part Shade
Bloom period
Summer
Urban environment
Harsh Exposure Tolerant, Compacted/New Construction Soils, Road-side/Salt Tolerant, Yards that Flood
Habitat
Prairie Grasslands
Growth form
Colonizing / Spreading, Rhizomatous/stoloniferous
Growth rate
Moderate
Flower color
Yellow
Fall color
Yellow
Size
- Mature height
- 3 Feet
- Mature width
- 2 Feet
- Max height
- 6 Feet
- Max width
- 4 Feet
Additional information
Butterfly host plant Loved by birds Pollinator hot spot