What is hydroponics?

Hydroponics is defined as a technique for growing plants using nutrient-rich water instead of traditional soil. This method allows for precise control over nutrient levels and can lead to faster plant growth, higher yields, and the ability to grow in environments where soil conditions may be unsuitable.

The key aspect of hydroponics is the use of a water-based solution that supplies all the essential nutrients directly to the plants' roots, facilitating their absorption. This system offers the possibility of growing plants in a more controlled environment, which can be especially beneficial in urban settings or regions with poor soil conditions.

In contrast, the other options do not accurately describe hydroponics. Using soil nutrients relates to traditional gardening methods, while preserving plants in cold temperatures pertains to storage rather than cultivation. Lastly, hydroponics is not limited to outdoor systems; it can be effectively utilized in indoor and controlled environments as well.