Silphium terebinthinaceum (prarie dock)
Saw it growing outside in a garden near the Botanic Gardens in Washington DC. My neice gardens in New Jersey (Forked River). She has a large garden and this plant would be a really great addition. The DC climate is not that different from my neice's, yet the hardiness map does not include NJ for this plant. Can someone tell my why She should not try it. I say give it a "go". What you say?