Yeah, we got plenty of them here. If anybody wants to get a start, I can fix you up. Just let me know how many you want, and I'll get you a price.
Actually, I've been trying to eradicate them on my place for 30+ years. Have to kill them with herbicide. No matter how many times you mow it down, it pops right back up. The tap root is huge.
That's so you know where to spray the 2,4-D!!!
BTW, we not only have the bullnettles, we have grass burrs (sand burrs), thistles, saw briers, as well as locust, prickly ash and hardy orange trees.