well i have the same problem, i have took a cutting of a sativas plant and t ws growing gr8 for about a week ,and now for some reason i wke up this day and it has mostly gone yellow wat does it needs help me.!? also for the extra bit of informaTION im growing it insdoors and have rasently fed it some plant feeed, would that work help lol? o sand i say u take ur plant indoors the weathers bot to good and it wont get any heat to phohotosyntesise