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Cup Plant (Silphium perfoliatum)

A very tall plant that towers prominently over the wet prairie. Spreading by seed and roots, this species can create small colonies in the right conditions.


  • Acronym: SILPER
  • Life-Cycle: Perennial
  • Bloom Color: Yellow
  • Bloom Time: July - September
  • Typical Height: 96"
  • Light Preference: Full Sun - Part Shade
  • Soil Preference: Wet
  • Root Structure: Taproot and Rhizome
  • Stratification: Cold & Moist for 60 Days
  • Seeds per Ounce: 1,400*
  • IL County Ecotypes we Grow**
    1. DeKalb County
    2. Kane 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 perfoliatum - Per Ounce

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