The process of growing plants in sand, gravel, or liquid, with added nutrients, is known as hydroponics.
What is hydroponics?
Hydroponics is the cultivation of plants in nutrient-enriched water in such materials as sand, gravel, or perlite.
Plants are normally grown in nutrient-rich soils for optimum growth.
In special cases such as in hydroponics, an inert medium or a medium lacking nutrients is used to grow plants with the addition of nutrients.
In conclusion, for optimum plant growth, nutrient-rich soils are required or nutrients are supplied to inert media such as sand or gravel.
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