here is a link i believe got from weedhound it is excellent: Revised: The Complete Guide To Sick Plants,pH and Pest Troubles - PlanetGanja.com
michaelpeg Reviewed by michaelpeg on . yellowing leaves help newbie Hi, first time growers here, I have been looking round on the net to see what cud be up wiv my plants. I think they have a nitrogen deficiency ??? Has anyone got any advice / opinions on what my problem could be?? See picsā?¦ The cuttings are 4 weeks old and have been under a 600 watt lamp and are being fed with terra vega.... Rating: 5