I've seen dog fennel grow on the most eroded hilltops you can imagine. I even named an archaeological site Dog Fennel Hill cause it was head high and thick on top of an eroded hill top. Its a pretty nice site in Russel County that dated to about 9500 years ago, but the damn dog fennel made it miserable to do the work on top of it.

"Never Trust Government" -- Smart people.
"The Great thing we should Fear and the Weird Thing we Trust is Elon Musk" -- Me
"You can be broke but you cant be poor." -- Ruthie-May Webster