Silphium integrifolium

Common name: Rosin Weed

Native plant

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

Forb

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, New Construction, 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

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Price:  $5.50