help huge plants with yellowing leaves about 20 days into flower

Hello i have 2 huge plants that are growing under a 1000 watter..the fan leaves are yelowing fast,is there anything i can do about it 15-20days flowering

this strain (green lantern) I have been growing for a while has always seemed to yellow fast but keeps on growing,so it could be the strain or my growing error.

Should i add nitro

i bet money you changed to "flowering nutes" right. and those nutes lack Nitrogen a very essential nute especially when the plant tries to double its size when entering flowering.

do your self a favor and feed a balanced diet. 10-10-10 is a good ball park range. use something around this npk ratio every other watering.

a pic would help but i already know its Nitrogen deficiency; lower leaves yellowing and dieing from the tips inward. yellowing climbs up the plant. feed her

i second that