Silphium asteriscus

Photographs belong to the photographers who allow use for FNPS purposes only. Please contact the photographer for all other uses.

Starry Rosinweed

Asteraceae (Compositae)

Plant Specifics

Size:2.0 to 5.0 ft tall by 1.0 to 2.0 ft wide
Life Span:Short-lived perennial
Flower Color:Yellow
Phenology:Dormant in cold areas but may grow year-round where warm.
Noted for:Showy flowers


Recommended Uses:Wildflower garden.
Propagation:Starry rosinweed will readily self-seed if left to its own devices. Collecting seeds is a simple matter of removing the dead head flowers once they are thoroughly dried on the plant. Store the seeds at room temperature and plant in late winter or early spring. Seeds are available through the Florida Wildflowers Growers Cooperative. Silphium asteriscus also propagates by rhizome, so root cuttings are a possibility.
Availability:Native nurseries, FNPS plant sales, Seed, Specialty providers
Light: Full Sun,  Part Shade
Moisture Tolerance:
always floodedextremely dry
 (Somewhat moist, no flooding ----- to ----- Somewhat long very dry periods)
Moisture Tolerance: Somewhat moist, no flooding ----- to ----- Somewhat long very dry periods
Salt Water Flooding Tolerance:Not salt tolerant of inundation by salty or brackish water.
Salt Spray/ Salty Soil Tolerance:Low/no tolerance of salty wind or direct salt spray
Soil or other substrate:Loam, Sand
Soil pH:5.1 to 7.6



Seeds eaten by birds.


  • Attracts butterflies
  • Attracts bees

Native Habitats:Moist roadsides, flatwoods, sandhill, scrub.

Distribution and Planting Zones

Natural Range in Florida
USDA Zones

Suitable to grow in:
10A 10B 8A 8B 9A 9B 

USDA zones are based on minimum winter temperatures


General Comments:The bloom period is relatively long - lasting from early spring, well into fall.