I do have a question about how much to give

The bottle says to mix 1 tsp per gal

How much do I actually give the plant?

If I have 2 gal pots, poor the whole gallon in to the soil till it leaks out the bottom or just a little fert? how much?
ProjectEight Reviewed by ProjectEight on . Nutrients Now that I have obsorbed so much informatioan I feel I am ready to learn more about what I need to help my plants. I went sort of cheap and am using a all in one type fert, Flora Nova Grow and bloom. I would like to step up on my next grow and maybe even a little on this grow. What I would like is a quality fert for grow and bloom and the little extra stuff like root growth and whatever someone reading this might also recommened. I am looking at Advancled Nutrients line but open to Rating: 5