Abstract: A hydroponic modular planting system includes individual growing modules, each having a combined growing chamber and plant supporting surface for growing plants hydroponically using a nutrient-rich solution. The individual growing modules can be stacked vertically and/or laterally to form a modular planting system built from any number of individual growing modules. The modular planting system can be formed into a large number of possible shapes and sizes and can therefore be conformed to a variety of growing environments.