Hi guys, new to the forum so I apologize in advance if this is yet another re-post of any kind. I'm am growing with a mix of LEDs (200 w) and CFLs (150 w). I've had no problems what so ever when it comes to autos, but when it comes to photoperiod strains, they ALL die within the first 2 weeks after I change the schedule to 12/12. Since it's a feminized strain I have (White Rhino), they show their gender when I put them to bloom and then, bit by bit, the leaves turns yellowish, they start to droop and eventually they just dry out and die. I am somewhat a rookie, so I don't rule out the fact that it's the lack of experience thus my plants never reaching budding stage. Some details - I grow my plants in coconut husk - I have a ph-meter, so the ph is always good. - Temperature is as it supposed to be - Good ventilation - All types of nutes for all stages of the plant's life So what am I doing wrong here? Nutritions? Do I need flush them? I first thought it was the lights, but I experienced the same thing this last summer when I had my babies on the balcony (facing south). Same thing there: the autos produced a reasonable amount of yield, the photos just... died. Thank you in advance and like I said, sorry for re-post. If you want images, I'll gladly take some pictures for ya. Good times, baby!