Answer for I have a 2 gallon sprayer. How much plow start vs water should I mix?

This depends on the acreage you need to cover. The ratio of water to PlotStart is not as important as ensuring the right amount of product gets applied to the right amount of acreage. (ie. 2.5 gal PlotStart to 1 acre) The more water you mix per acre, the better coverage you will get. For simplicity’s sake, mix 1.5 gal of water to .5 gal PlotStart  in your 2 gallon tank.