I got a moisture meter too recently was was wondering the same thing. The back of the package has recommended water levels for like hundreds of different plants and of course cannabis is not one :P It ranges from 1 to 10, 1 being dry and 10 being wet. Was wondering what reading i should shoot for when watering. The one i got is similar to this one, i know its a cheapie but i figured it would dojust for checking moisture.

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