First time using megacrop and sweet candy on autos. Growing in sunshine mix 4 and ph to 6.3. I fed at 5g/gal last watering 2 days ago. I bought some calmag just to have on me but just wanted to confirm if that what this issue is? Only on the most progressed into flower. Affected leaves feel very dry.
If you aren't yet, try adding Earth Juice MicroBlast or similar.