Ive had these leave pop up on the 2nd week of flower, I'm growing in a 1.2 x 1.2m tent, 6inch high output extractor, 1 12inch fan, 600w duel spec bulb, 9 plants about 3ft tall in 11ltr pots with a mix of coco, biobiz all mix and perlite. No feed through veg as i kept potting up with new mix...