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Botany or Plant Biology
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Does chlorinated water effect plant growth?

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February 08, 2014 12:18PM

Chlorine is considered a micro-element in plant growth and is required in small amounts for normal plant metabolism. However, applied or absorbed in high concentrations it can burn, damage or even kills plants.

Chlorine is toxic to most plants at levels exceeding 350 ppm (parts per million), some more sensitive species such as ferns show toxicity at 100 ppm or more.

The "regular" chlorinated water out of the tap doesn't have enough chlorine in it to significantly harm plants. Bottled water normally has a chlorine level of about 50 ppm.