Hydroponics is growing plants without soil. Water, light, and nutrients provide all the plants need for life and growth. And yes, these growing setups are usually installed vertically to maximize growing space. It’s not a new idea, but it is not as common as in-soil gardening, especially among home gardeners. Even so, hydroponics is growing in popularity with home gardeners who usually have a curious bent and are eager to try new growing techniques. There is a small initial investment, but the main components (PVC pipe and fittings, a pump, nutrient solution, and a few other things) are fairly inexpensive and easy to find.