hi it could be a few problems like over feeding on the nutrients,bugs,ect fill out a trouble shooting form and post it here.

http://boards.cannabis.com/plant-pro...ing-forms.html
whitetop Reviewed by whitetop on . Kaya Gold outdoor grow Ireland, problem Hi, I'm new on here and also a first time grower. I have 3 Kaya Golds growing outdoors - I got them because they sounded hardy and well suited for the Irish climate. I planted them early June. One of them is as tall as me and looks well healthy. I went to check on them today - and the other two, within a week and a half, have aquired yellow tips on a lot of the leaves. And any of the new, baby leaves have gone brown and kind of dusty (mouldy?) looking. They haven't grown as much as the Rating: 5