What "hydroponics" means in gardening

Hydroponics is a method of growing plants without soil, in a nutrient-rich solution. It involves using a water-based solution to provide the necessary nutrients to the plants, which are usually grown in containers filled with inert materials like sand, gravel, or coconut coir. This method of gardening is becoming increasingly popular, especially in urban areas, because it allows plants to grow faster and in smaller spaces. It also uses less water than traditional gardening and reduces the risk of soil-borne diseases.