9 Common Mistakes To Avoid in Trying to Control Invasive Knotweed

This video describes nine common mistakes people make in trying to control invasive knotweeds like Japanese knotweed (Polygonum cuspidatum or Fallopia japonica). 00:00 These are nine common mistakes to avoid when controlling knotweed. 00:13 Mistake No. 1: Trying to kill knotweed by repeatedly cutting or mowing it 01:00 Mistake No. 2: Trying to kill knotweed by covering it with just tarps or landscape fabric 01:58 Mistake No. 3: Doing an herbicide treatment too early in the growing season 04:42 Mistake No. 4: Doing only one herbicide application 05:50 Mistake No. 5: Cutting knotweed in summer before a fall herbicide treatment 06:40 Mistake No. 6: Lack of persistence in staying after the knotweed. 09:30 Mistake No. 7: Waiting too long to plant native plants to compete with the knotweed 10:38 Mistake No. 8: Not knocking down dead knotweed stems the season before treatment 11:24 Mistake No. 9: Not doing anything! #greenshoots #knotweed #backyard #backyardgardening #homeowners #herbicide