10/26/2026
What’s in the field? IWM Integrated W**d Management - when are problem weeds shutting down for the winter?
Killing frost, shorter days and cooler temperatures signal most herbaceous weeds to senesce (go dormant by dying back to root systems), but cool-season perennials such as Canada thistle, quackgrass and dandelion persist a bit longer. They can retain green living foliage even after several frosts and may still be targeted if they are actively growing, and not turning yellow or brown.
Fall burndown and spot treatments are most effective if temperatures have not dropped very far or long below 28 degrees, and should be targeted for sunny and warm days. For more information, check the link in the comments ->
