pouyan for future reference a nitrogen deficiency will generally start at the bottom of the plant as the plants upper leaves are much more important to its survival and then move up the plant. A nitrogen deficiency turns the leaves a very pale green, then yellow, they don't brown and crisp over like yours have, it looks like someone has put a flame to it.
MegaOctane12 Reviewed by MegaOctane12 on . Nutrition Deficiency -- I think iron? NEWBIE I NEED HELP i've attached 3 photos of my plants. At first they were doing fine but the growth is now stunted. the lower leaves are turning yellow and falling off so i added a fertilizer (15-15-15). I think i overfertilized which caused some of the leaf edges to burn. Regardless of the fertilizer, the soil has perlite, sand, peat moss, and a little bit bird manure. It is very spongy and seems fine, but the plants won't un-stunt their growth and the leaves continue turning yellow despite the fertilizer. Any Rating: 5