OK, I have been researching the using vinegar as a weed and vegetation killer (along with salt, I have a "recipe"). Anyway, I have an overgrown area along a drainage creek with grass, weeds, blackberry bushes, etc. and I need to kill all this stuff off and replant at some point in time (a year or so). Once I kill it off I plan to lay down a lot of shredded ships to hold stuff back until I do plant. Round up would be expensive to kills all this (roughly 200 ft by 15 feet). How well does the vinegar REALLY work for an area like this? Does anyone know where I can buy the concentrated vinegar at? Thanks a lot.