If you have an especially invasive plant that is large & you want to get rid of it you can cut it back to 3 or 4' ht. Then drill holes 2 or 3" straight down into the stems, pour Roundup in the holes. The plant will take the poison internally & it will kill any suckers also. You may wish to refill the holes after about 12 hours. Please be sure to cover each filled stem with tin foil secured with a twist tie so our lizard & insect friends don't get into the poison. I had a shooting star clerodendron that I had to treat this way. It was sending suckers out 30' away!
I sent this in as a tip --- it hasn't been published yet. Needs a photo --- maybe you can take the photo & co-op the tip.
I used Roundup Tough Brush Killer FULL STRENGTH. It's worth a shot. Try it.
