I fought smartweed in all of my clover plots this summer. Finally gave up on my oldest plot and just tried to keep it mowed down, but in the end, the smartweed won. From what I've read, fire will pretty much kill the smartweed off permanently (if that's even possible). Anyone here have experience with burning smartweed? I am thinking late winter/early spring, assuming that the burn will work while the smartweed is dormant.