I cleaned out all my veggie patch after all the rain then suddenly(its next to the house and if no work I don't look much there) it was covered AGAIN like a thick carpet I now removed 5cm of all the earth but this thing seem to have a huge spider mesh like roots. Then there are these other monsters that make (butter cup) like flowers that I get since the neighbor left his lawn unattended 3 years ago for 6month never cut etc Before never had these. They jumped the fence and have since then invaded anything undergrowth, behind any rock or wood or pot etc its a night mare. I already dug out two huge bins filled with the roots as much as possible. The root system is never ending. Where can I buy what to kill these things without going against the new NON chemical products. Thanks for any help I am in Vancouver Canada