A technique for growing plants in culture solutions rather than in soil. The roots are immersed in an aerated solution containing the correct proportions of essential mineral salts. (From Concise Dictionary of Biology, 1990)
    

concept

How to grow marijuana hydroponically / by Patrick Daniels ; cover photographed by Douglas Ethridge.

Gardening : the rockwool book / by George F. Van Patten.

Marijuana hydroponics : high-tech water culture / Daniel Storm.

Beginner's guide to hydroponics : soilless gardening / by James Sholto Douglas.

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Hydroponics

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How to grow marijuana hydroponically / by Patrick Daniels ; cover photographed by Douglas Ethridge.

Gardening : the rockwool book / by George F. Van Patten.

Marijuana hydroponics : high-tech water culture / Daniel Storm.

Beginner's guide to hydroponics : soilless gardening / by James Sholto Douglas.