Uh oh... Leaf problems! Any thoughts from the more experienced folks? First grow for me...

She is hungry !!! Tiger boom was the only product I really liked from fox farm, when I used it ... You should supplement her more, grow big I think is veg line, but you have to use it till week 5 of flower, just reducing amounts, plant still needs nitrogen, yours is hungry in all NPK All the Best !!!

Could be Mg maybe even a Mn deficiency. I would sometimes get those brown spots from over-watering, as it led to root issues. So, many questions to ask though when trouble shooting, like your starting mix, how often you feed and water, etc. I typically cal-mag all the water I use and always let that water sit for a day to air out any chlorine. Also, I learned it is okay to water every other day. Watch the plant, but mostly feeling the weight of the pot-- that is a great technique! Over-watering was my biggest problem last year when I started growing. I have started top dressing with worm castings (3 tbs) and an organic 4-4-4 (1 tbs) whenever I see any yellowing. I have also been adding microbials to the water which has really made a difference. You might get more fruit flies and gnats, but some sticky fly traps do the trick. A more experienced grower might have additional recommendations. Happy growing!

O also if your using liquid nutrients you may want to monitor the EC/PPM with a TDS pen to ensure its not to strong for them. Good Luck!