Weed B Gon is labeled for the control of sow thistle. However, I would suspect that an application during the winter would have little effect on this weed. I would think that for best results, treatment should be applied when the weeds are young and actively growing, which would be during late Spring or early Summer.

Paulownia has become a weed nuisance, it comes up in waste places. I spoke to the guy who works on my chainsaw recently, he said noone has cut Paulownia in 25 years, no market. See link on trees forum. Usually novice gardeners are attracted to the freakish leaves but experienced gardeners know to avoid this species. Here is a link that might be useful: Paulownia Thread

Great..Now that we know what they are, how do you rid of these horrible things..I saw this problem comming when my neighbors decided to let their yard be over run.. They gave up and let them win, until I stepped up to the plate to keep their yard up, and these things keep coming back.... They inched closer and closer to my manicured flower beds, and now I have them.. What works so I can get a head start next year? How do you kill weeds that have root feeders? Maybe Roundup? I hate chemicals..But if this the only way, I will use the stuff, even if it shortens my life..Arg Thanks so much...

Oh I think you're right! We DID have a large stand of volunteer flowers that looked just like your link growing back there before everything was cleared out. I never knew what they were called and I somehow assumed when everything was pulled up/bulldozed/trenched for sprinklers, that they were gone with the rest of the mess. Haha. Hardy things, huh? Thank you!