I have my plants in 30 gallon geo pots, E.B. Stone 420 recipe soil, Cal Mag plus as nutrients, and outdoor. I’ve topped a few, trying to learn everything I can since it’s my first real grow. The weathers been 90’s in Northern California. I water every two days with nutrients. I start by watering one gallon then waiting 20 minutes before adding two gallons with 3 teaspoons of Cal mag plus each plant. I’ve began noticing yellow leaves at the bottom, I’ve read usually means lack of nitrogen. I need opinions and advice. Thanks in advance