The patent application is directed to a moisture indicator that reversibly changes between two different colors depending on whether the moisture indicator is in a wet state or in a dry state. The moisture indicator is used to provide visual information about dryness/wetness of a substrate such as plant soil. The moisture indicator comprises a porous body member having a moisture indicating color and a moisture indicating material over the moisture indicating color. Water passed through the porous material activates the moisture indicating material from a dry opaque state to a transparent clear state. In the transparent clear state, the moisture indicating material reveals the moisture indicating color.
