actually its not very common, its common that the first two true leaves yellow up and start cutting up, those are the first 3 leaves am having the same problem with my bubblelicious, not much of a deal though it will spread out quick if you dont solve it, check your PH level which is more likely to be that if your PH level is good then its magnesium deficiency like milk said which your feeding would solve hopefully if it has any mag
on the other side, outstanding looking plant brutha, cant wait to see its harvest, good thing you got all the light spectrum's covered up so yield would sure not be low, going to keep an eye on this one and dont forget the smoke report
much regards
otwo
on the other side, outstanding looking plant brutha, cant wait to see its harvest, good thing you got all the light spectrum's covered up so yield would sure not be low, going to keep an eye on this one and dont forget the smoke report
much regards
otwo
its not as bad as i thought .. all other growth seems perfectly fine , and you always keep a check on your ph , so dont panic yourself, just keep doing what your doing , dont go happy mondays on the ferts and get some epsom salts and your laughing 
