Which of the following is not true about hydroponics?

The correct option is: "Plants through hydroponics cannot be cultivated everywhere"

Hydroponics is a modern method of horticulture and agriculture that involves growing plants without soil, using mineral nutrient solutions in a water solvent. Understanding why the selected option is the incorrect statement about hydroponics requires analyzing its features and benefits:

1. Cultivation Anywhere: One of the primary advantages of hydroponics is that it allows plants to be grown in environments where traditional soil-based agriculture is difficult or impossible. Because it does not rely on fertile soil, hydroponic systems can be set up in deserts, urban areas, rooftops, cold regions, and even indoor facilities with controlled lighting. Therefore, saying that plants cultivated through hydroponics cannot be grown everywhere is untrue; they can actually be cultivated almost anywhere.

2. High Investment: Hydroponic systems require specialized infrastructure, including grow lights, pumps, reservoirs, nutrient solutions, and monitoring systems. This makes the initial setup cost high, which is a true statement.

3. Technical Knowledge Required: Maintaining the correct pH levels, nutrient concentrations, water temperature, and aeration requires specialized knowledge. A failure in the system can quickly lead to plant death, making technical expertise a necessity.

4. Misuse for Banned Crops: Because hydroponic systems are indoor, compact, and highly efficient, they can unfortunately be misused to grow illegal or banned crops (such as cannabis) away from public or regulatory view.

Consequently, the statement "Plants through hydroponics cannot be cultivated everywhere" is not true, making it the correct answer to the question.