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What you should know
What is ph?
The pH scale ranges from 0 to 14, with a value of 7 being neutral. Values greater than 7 indicate alkalinity, and values below 7 are acidic.
pH is a measure of the relative amount of free hydroxyl and hydrogen ions within a substance. The more free hydrogen ions a substance has, the more acidic it is.
Because the plants can only absorb nutrients within a specific window, an environment that is too acidic or alkaline can cause nutrient lockout.