I have had my plants in 4 inch square containers filled with Fox Farm soil since day 1. It has been a little over three weeks, and I have been watering almost every day. It gets very hot in my grow room. (I know not good) My question is, I am going to start feeding my plants. The nutrient solution I have is Bio-Grow by Bio Bizz. It is N 2 P .1 K 6.6 I was going to go by the directions to feed the plants but it says I can feed with watering every time. Will that be too much? How often should I feed the plants with my watering? (I have the same soil in the pots since day one)