pH is the value used to determine if a material is acidic, neutral or alkaline. It is measured on a scale from 0 to 14 where 7 stands for ‘neutral’.

pH is important because it determines how well nutrients can be absorbed by a plant. The ideal pH levels for cannabis plants is between 5.5 and 6.5.

Growers often refer to pH levels when they talk about the “acidity of water”.

Learn more about pH levels:

More water related definitions:

EC (Electric Conductivity) | Irrigation system | Dropper | Water temperature

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