you are more than likely facing one of three problems 1.) you may have to back off on the feed the plant is recieving sounds a possible overfeeding problem to me. 2.) your humidity is too high can you possibly get use of a dehumidifier. 3.) if found out its not an overfeed problem your root system uptake may be locked up try a direct foliar feed with a dilute solution. and one more thing that springs to my mind is bugs, closely inspect all leaves and undersides to clear possibility of bugs sucking juices from your leaves. hope ive found your problem !
ganja09 Reviewed by ganja09 on . 1st grow please help i am growing 2 hindu kush babies, grown from seed. they were originally in soil, however i have recently switched them in to my home made top feed system. i have been using an organic veg solution, ans have followed the guidelines strictly as to how much to use for seedlings. they are being grown under a 400 watt hps, 18 on / 6 off. all of the older leaves are turning completely yellow and the newer leaves are turning brown on the tips. i have tried raising the light because i thought maybe Rating: 5