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There are observed differences in the field between two pH meters’ readings. This can get many growers confused with the true value of the pH of the medium on which their plants grow. This article will answer the confusion.

Hydroponics was coined in the USA in 1930’s to name the scheme plant growing with the roots based in mineral-rich waters. As a matter of information, the Aztec Indians had a similar scheme of producing crops on rafts in lakes with shallow levels of water; these are seen in their floating gardens in Mexico City.

Hydroponic gardens are present with the early societies of man. Evident with the Hanging Gardens of Babylon and the Indians of Aztecs, there had been several systems of producing plant crops without soils.

The Indians of Aztec had been known for a scheme of producing crops on rafts in shallow lakes. As an evidence of such ingenuity, you can even witness these gardens near Mexico City.