Help S.O.S. Browning leaves been spraying with plant therapy

you have pH issues , what you need to do is add humic acid to your feed and feed less NPK and other stuff. Hope this helps ! 🚀

More than likely its some sort of chemical burn. Too much nutrients or the likely. Also likely that there is some amount of light burn going on due to the foliar spray. Dial it back. Defoliate the worst parts and hope for the best on the rest.

Not good, normally i say never give up, but that looks bad.......look under the leaves are there tiny sancorn like things=? and alot of them=?.... Because if i look here, looking like you have mites did they have first lots of spreckles=? and then getting worser and leves turn yellow=?... if yes its mites... if no..... i just agree with mR. weeds... Sprays only before lights turn out

it's the spray combined with your lighting that's burning up your plants. The thrips wouldn't make the plant look like this, but they are still a problem. Try spraying your plant close to lights out to help fix the burning of the leaves. Hopefully, I answered your question and remember " Happy Growing and Free your mind one puff at a time ".