Starry Rosinweed
Silphium asteriscus
Last reviewed: August 2026
Silphium asteriscus is a native wildflower blooming yellow from June through September across the southeastern and midwestern United States. This drought-tolerant perennial attracts bees, butterflies, and beetles to prairie and woodland edge habitats.
Toxicity unknown
Starry Rosinweed (Silphium asteriscus) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
24"–60" H × 12"–24" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, FL, GA and 17 more states
Pollinators
bees, butterflies, beetles
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 437 programs across 44 states, each with a link to the provider and the date we last checked it.
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Starry rosinweed is a tall native perennial that produces bright yellow, daisy-like flowers from summer through early fall. This drought-tolerant plant forms upright clumps and can reach up to 5 feet tall, making it an excellent choice for the back of flower borders. The cheerful blooms provide months of color while requiring minimal water once established.
Growing Starry Rosinweed
Grow Starry Rosinweed in full sun and low water. Mature plants reach 24 to 60 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Starry Rosinweed takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Very tall height (up to 5 feet) may violate front yard restrictions
- Can appear weedy or wild to conventional landscaping standards
- Dies back completely in winter leaving bare stems
Wildlife value
This plant is a pollinator magnet, attracting bees, butterflies, and beetles with its abundant nectar-rich flowers. The long bloom period from June through September provides consistent food sources during critical late-season months.
Common questions
- When does Starry Rosinweed bloom?
- Silphium asteriscus blooms from June through September, producing yellow composite flowers that attract various pollinators.
- Where is Starry Rosinweed native?
- This species is native to 21 states spanning from Texas and Florida north to Pennsylvania and New York, including much of the southeastern and south-central United States.
- What pollinators visit Starry Rosinweed?
- Silphium asteriscus attracts bees, butterflies, and beetles with its abundant nectar and pollen resources during its long blooming period.
- What growing conditions does Starry Rosinweed prefer?
- This hardy perennial thrives in full sun to partial sun with low to moderate water requirements, making it well-suited for naturalized plantings and drought-tolerant gardens.
- Is Starry Rosinweed HOA-friendly?
- Starry Rosinweed takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Starry Rosinweed? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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