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Silphium integrifolium

Phonetic Spelling
SIL-phee-um in-teg-rih-FOE-lee-um
Description

Rosinweed is a native herbaceous perennial in the aster family found in central USA and parts of Canada. It grows along roadsides and railroad tracks, in fields and pastures. The sunflower-like blooms occur late summer to fall on up to 6-foot tall stems and attract bees and butterflies. 

It is adaptable to most soil types if they are well-drained in full sun to partial shade. It is drought tolerant once established. Use this plant in naturalized or native areas. It may be too weedy to use in a small garden.

 

See this plant in the following landscape:
Cultivars / Varieties:
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Cultivars / Varieties:
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  • Attributes:
    Genus:
    Silphium
    Species:
    integrifolium
    Family:
    Asteraceae
    Life Cycle:
    Perennial
    Recommended Propagation Strategy:
    Seed
    Country Or Region Of Origin:
    Central USA and into Canada
    Distribution:
    AL , AR , CO , IA , IL , IN , KS , KY , LA , MI , MN , MO , MS , NE , NM , OK , SD , TN , TX , WI
    Wildlife Value:
    Attracts bees and butterflies. Songbird will eat the seeds.
    Dimensions:
    Height: 2 ft. 0 in. - 6 ft. 0 in.
    Width: 1 ft. 0 in. - 3 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Native Plant
    Wildflower
    Woody Plant Leaf Characteristics:
    Deciduous
    Habit/Form:
    Erect
    Growth Rate:
    Medium
    Maintenance:
    Low
    Texture:
    Coarse
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Clay
    Loam (Silt)
    Sand
    Soil pH:
    Neutral (6.0-8.0)
    Soil Drainage:
    Good Drainage
    Occasionally Dry
    Available Space To Plant:
    Less than 12 inches
    12 inches-3 feet
    NC Region:
    Coastal
    Mountains
    Piedmont
    USDA Plant Hardiness Zone:
    4a, 4b, 5b, 5a, 6a, 6b, 7a, 7b, 8b, 8a
  • Flowers:
    Flower Color:
    Gold/Yellow
    Flower Inflorescence:
    Corymb
    Head
    Flower Bloom Time:
    Fall
    Summer
    Flower Petals:
    more than 20 petals/rays
    Flower Size:
    1-3 inches
    Flower Description:
    2-3 inch wide sunflower-like flowers with 30-40 rays and many disc florets and subtended by bracts with reflexed tips. Blooms July to Sept.
  • Leaves:
    Woody Plant Leaf Characteristics:
    Deciduous
    Leaf Color:
    Green
    Leaf Feel:
    Rough
    Leaf Shape:
    Lanceolate
    Ovate
    Leaf Margin:
    Entire
    Serrate
    Hairs Present:
    Yes
    Leaf Length:
    > 6 inches
    Leaf Width:
    1-3 inches
    Leaf Description:
    Rough, stalkless, large paired leaves with or without teeth with resinous juices. Up to 8 inches long, lance to ovate shaped, hairs on both surfaces.
  • Stem:
    Stem Is Aromatic:
    No
    Stem Surface:
    Hairy (pubescent)
    Stem Description:
    Strong green stems
  • Landscape:
    Landscape Location:
    Meadow
    Naturalized Area
    Woodland
    Landscape Theme:
    Pollinator Garden
    Design Feature:
    Border
    Small groups
    Attracts:
    Pollinators
    Songbirds
    Problems:
    Weedy