Interesting plant. Maybe it will grow in Florida panhandle https://en.wikipedia.org/wiki/Silphium_perfoliatum
Discussion
It's been an excellent rabbit feed, and now it's spread so much that we should have enough to feed the sheep. It should be very easy to cut, hang/dry, and store in bundles for winter feed too. Grows so tall it's excellent as a privacy screen too. Very useful, hardy versatile plant for sure.
