Will venture 2 guesses because you have 2 symptoms:
#1) browning / yellowing tips are often a heat problem, or moisture prob if you got them a little dry last watering or 2. Same thing actually, these 2 probs are identical in symptoms and caused by same thing...... leaves dried out a bit from dry soil or hot lights a bit hot.
#2) leaf miners causing the white strips pretty damn sure on this one.
http://www.growweedeasy.com/cannabis-leaf-miners
Neither one look like a great problem to me in your case. As they get older you are most probably going to have some shit going on.
Not sure of your fert regime but I like them a little darker and would bump up 50% for one watering but don't do anything stupid like OD them with your ferts. Just a balanced 3-1-2 fert. My plants always tend to look a bit or a lot ragged as we go deeper into flower. Look for the green, stand back 10' and if they are generally (80%) green, you are generally good to go.
Nutrient probs are difficult if not impossibe to conclusively diagnose over the internet. You'll find some kid that has a couple hours reading under his belt that will give you a chemical solution, but slow and easy at this point. No drastic changes on anything.
All in all they look decent to me, I would not me losing any sleep yet. BEST of luck. - Peace
Hi guys. Im in week 2 of flowering and since i started to flower the fan leaves are turning yellow at the edges. This is on every single of my fan leaves. Im growing in coco 30 gal pots. Run to waste. Ph is always between 5.8 and 6.2. Ec is around 1.5. My temps are pretty high im growing in a greenhouse. Can get to 100 easy in the day. Also at night ive been getting abit of dripping off the roof onto the plants so im thinking maybe some sort of fungus. Im using sm90, kelp, hydrozyme, silica and cyco base nutes.
