Article : There are many things that can complicate feeding your plants hydroponically. It can be hard enough trying to feed the right strength and right ratios of nutrients, let alone trying to figure out trace and secondary nutrients. Once you get past these basics, you can consider plant vitamins, hormones, and keeping everything at the right pH. If you are just starting out and you only have 20 bucks in your pocket and a teaspoon, this is written for you. Small Space Gardening.