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/default.aspxBluelabGrowBook-EnglishBluelabGrowBook-EnglishBluelab’s knowledge-base contains articles, booklets, charts and tips to help you learn more about measuring pH, conductivity and temperature.

This section is dedicated to providing helpful information, so you can grow better plants or have healthier fish, no matter what size hydroponics or aquaponics system you have.


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The impact of pH

In 2016, The Center for Applied Horticultural Research did a study on the impact of pH on plant growth.

Firstly, they found that the different plant species had different optimum pH values where the best quality plants were produced. For example, tomatoes grew best at pH 6.5 and petunias had a 50% growth increase at pH 4.5 than when they were grown at any other pH value.

Secondly, they found that even if the pH value of the root zone wasn’t the optimum one for that species, the plant would still grow better than if the pH was not controlled. In fact, there was a 44% loss in tomato yield when there was no control of the pH.

These findings showed the clear importance of taking regular pH measurements and controlling this in the growth environment to increase and optimise production levels.

Download the full research report.