Hey everyone. Well, my plants seem to be doing preaty good for the most part. Some of the leaves on my plants are starting to turn kind of yellow, and I'm wondering if that's from a lack of nitrogen in the soil. If it is, what can I do to increse the amount of nitrogen without using any ferts? I don't want to use any ferts because I want to grow as organicaly as possiable, but mostly because I don't have any money. I do have a random assortment of plant type growing stuff around the house, because my parents use to grow orciades. Any advice would be greatly apperiated.