Prairie Dock (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.