Silphium laciniatum, Compass Plant


Special Notes:

When collecting seeds, the disk florets (interior blooms) are sterile and as such do not produce seeds. The ray florets (exterior) are where you will find the large, flat seeds.

S. laciniatum is a slow-growing perennial. When grown from seed, it may take 2-3 years before individuals flowers.  There have been reports of this plant living up to 100 years.


  • Listing ID: 2652
  • Duration: Perennial
  • Soil Moisture: 1-5 (dry to wet): 1-3
  • Stratification: 60 days cold moist stratification required
  • Bloom Time: June-September
  • Family: Asteraceae (Aster)
  • Sunlight Exposure: Full Sun
  • Latin Name: Silphium laciniatum
  • Common Name: Compass Plant
  • Eco-Region: 251-F