Hi. I am feeding with advanced a+b. Soil has organic nutrients like guano and bones. Outdoors with lots of heat and humidity. Any ideas? Thank you a lot!
Those spots are likely from pH. I'd cut out the a+b, run plain water. Check your ingoing pH, target 6.5
If the plant looks hungry or could be pushed a little more, then hit it with a light dose of AB. Not sure which formula your using sensi or conni, but your liquid nute should be a bloom formula.
Also this is a big one, if your going to feed any liquid nutrient, alternate with feed, water, water, feed. This will help to use up/ rid accumulated sodium and assist in pH control. It's way easier to hit them with something than it is getting it out.