Hops are weeds that I constantly battle in my yard. Here they are climbing over the fence into my yard. Yeah, I know, people use them to brew beer, but they are invasive. They will choke other plants to death, they spread by seed and tough-as-nail roots, and the vines and leaves are caustic. Touch them without gloves and you'll have an itchy rash for a while. I've been trimming this threatening set once a week to try to keep them way. I swear the vines can grow three feet in a day.