Okay I use 12-12-12 all year because its cheap and I have a 20lb bag that will last me forever. Anyway my question is I want to dissolve some in a gallon of water and water my plants with it. Anyone have any ideas how much I should add to a 1 gallon jug of water......to water say once every 2 weeks? Or once a month? I thought maybe a 1/4 cup per gallon would be good for once a month and 1/8th cup if watering once every other week, but im just guessing.