Could be a couple of things. Copy-n-paste the proper troubleshooting form here, and fill it out as best you can. The more accurate the info you provide is, the more accurate the diagnosis and treatment plan. Takes a few minutes, but worth the effort. :thumbsup:

(the link the the troubleshooting forms is in my signature. Use the one for soil grows)
Rusty Trichome Reviewed by Rusty Trichome on . Leaf discoloration/death I think I have a deficiency of some sort in my plant. Four days ago I noticed a slight discoloration in some of the lower sets of leaves. I figured it had probably eaten through the nutrients already in the soil, so I decided to give my plants it's first feeding. The discoloration has now begun moving up the plant, and the lowest sets of leaves are dead. I've read through descriptions of nutrient deficiencies but most of them are pretty ambiguous and I'm having trouble pinning down what Rating: 5