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Compass Plant (Silphium laciniatum)

A very tall plant that towers prominently over the mesic prairie. The flowers change direction throughout the day following the sun, giving it its name. The taproot can reach a depth of 15 feet or more.


  • Acronym: SILLAC
  • Life-Cycle: Perennial
  • Bloom Color: Yellow
  • Bloom Time: July - September
  • Typical Height: 96"
  • Light Preference: Full Sun
  • Soil Preference: Mesic
  • Root Structure: Taproot
  • Stratification: Cold & Moist for 60 Days
  • Seeds per Ounce: 660*
  • IL County Ecotypes we Grow**
    1. DeKalb County
    2. LaSalle County


Other scientific names used for this species:

  • None


Other common names used for this species:

  • None


*Approximate, actual number of seeds may vary slightly by seed lot.

**We have listed the County ecotypes that we grow for this species, this ecotype may or may not be available at the time of your order. If you prefer one of the ecotypes over another please type it into the "Additional Info Section" and we'll provide that ecotype if it's available, if it is not available we will provide one of the other ecotypes listed.

Silphium laciniatum - Per Ounce

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