I use foxfarms myself dood and they way I've been doing it for veg growth is like this: Two "waterings" a week, the first is just straight water, i get the soil nice and saturated (visibly dark around 8 inches radius of the plant). Then when I feed it the second time for the week I basically just use a teaspoon per gallon like it says. This really translates into about a teaspoon for every 16 cups. So a 1/4 teaspoon would be good for a 4 cups (quarter gallon). When I feel like the plants are becoming stronger and more capable of handling nutes I slowly up the dose by eye balling an extra drop or two everytime.