Yes it still grows wild in parts of the Midwest. It is not potent weed that can get people high. It is left over weed from when Hemp production for rope fiber was still legal. it can be found growing at the edges of corn and soybean fields.
This stuff was abundant around Chanute AFB, and as I recall several airmen tried to smoke the stuff. They coughed a lot and gave themselves headaches, that is all. It also grew wild on the base and could be seen sticking up when the lawns were not mowed.
I have heard it said that marijuana is a major cash crop in Kentucky from some LE's that live there. These are drug producers, not the same thing as wild hemp.
You have heard correctly. My dealer calls it "Kentucky Holler Weed", as in "grown up in the holler", much like the old moonshiner days. Not too different from your average sativa-indica hybrid, which is quite popular these days.
Would that be down on 'Copperhead Road'?
A lot of them used to run 'shine, too. They make more money growing ganja now. Free enterprise in action, good God how that must rile these globalist/statists.