We have to talk about the watering technique..

Put away the sprayer...you want water to get to the bottom of the pot, not just the top of the soil.

What doseage is on the bottle of nutrients?
Do you have a 4 gallon jug anywhere?
Water to the point that water runs out the drainage holes. Test the PH of that water once in a while, litmus paper is cheap and will keep you going for a while.