Are you adding the Golden Tree based on any particular schedule, or any other reasoning?
I looked it up and it does have some good stuff in it. But it’s main effect is going to be to add a bunch of potassium.
The main thing about nutrients is maintaining balance. Once one nutrient is present in deficient or toxic levels, it almost always tends to throw off the intake of other elements. It quickly becomes very very complicated.
That high K level could certainly be causing your leaf issues. Toxic K levels can cause exactly those symptoms.
Unless there’s some good reason to add more K, I would skip adding the G Tree stuff for now, research a tried and true feeding schedule with the fox farm nutes you’re using, which are very commonly used around here, and stick with that for a while.
Your plants look reasonably good. Some nutrient issues. Maybe a little spindly like they could use more light.
I think you’re looking at a basic party pack of common new grower issues. You’re dealing with a whole lot of variables and it quickly becomes chaos once you start randomly pushing buttons.
It’s smart to dumb things down. Keep everything as simple as possible.