Prairie Dock (Silphium terebinthinaceum)
Prairie Dock (Silphium terebinthinaceum)

Prairie Dock (Silphium terebinthinaceum)

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Binomial

Silphium terebinthinaceum
Execellent large foliage plant with leaves shaped like elephant ears.  Produces large birdseed.
 
Uses:  Bees, birds, butterflies
Bloom time:  August - September
 
Height:  24 to 36 inches
Space:  18 to 30 inches
 
Sun:  Full sun to light shade
Moisture:  Dry to average
 
Seed:  Harvest September/October. We've germinated the seed without any pre-treatment, but we usually give it 6 to 8 weeks of cold moist stratification.
  • 1,100 seeds per ounce
  • 3 ounces per 100 square feet
  • 40 pounds per acre

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