Hydroponics is a method of cultivation of plants without soil, where the plants are grown in nutrient-rich water solutions. This method of cultivation has been around since the early 20th century and is used to grow a variety of plants, from vegetables to flowers. Hydroponics is an efficient way to grow plants as it requires less space and fewer resources than traditional soil-based cultivation. Additionally, hydroponics can be used to grow plants in areas where soil is not available or is of poor quality.