I'm seeking some help, I noticed yellowing fan leaves from the lowest part of my plants.
The Earth box gets watered ever 3 days or so, I usually let about a gallon or just under trickle out.
I'm thinking I should have flushed it better or something. I can't see the roots, so don't know if it's root rot.
The only thing I can think of is flushing it with Hydrogen peroxide and give a half dose of FF Big Bloom.
Any help on, how much HP I can use and is there more than one kind of Hydrogen Peroxide?