I had the same problem... my leafs were yellow, reason... my pot was too small, but in your case in maybe nitrogen/magnesium defincency OR too much nutrients OR the light is too close that it is burning the plants, hold your hand underneath the light & see if you feel any discompfort, if you do then your plants will do too.
Dude0
dude0 Reviewed by dude0 on . update Inca Spirit yellowing suggestions please hey everyone this is day 34 from seed the ones in the bigger pots what i want everyone to look at is the yellowing on the 1 pic .Why is it yellowing if anyone knows would be helpful . We had them in peat moss natural peat moss no nutes, we added half of amount of food that the bottle said were using Pure Blend product. they are a lil stunted do to 3 transplants allready so they should be a lil taller by now but this is the last transplant. anyway thanks to all those helpin out on this grow and Rating: 5