A system for electrostimulation therapy includes two or more electrodes of different metals or metal alloys. The electrodes can be optionally provided on a flexible non-conducting substrate with a binder, thereby acting as a bandage or patch. Alternatively, the electrodes can be in the form of a needle, such as acupuncture needle, bracelets, armbands, wristbands, necklaces, or jewelry pieces. A method for electrostimulation therapy includes the steps of attaching a first electrode to a user or soil of a plant at a first location and attaching at least one additional electrode to the user or the plant at other locations for a predetermined period. The electrodes are not connected to a voltage or current source. Because at least two electrodes are of different metals, they cause an electrical current to flow via at least a portion of the user or the soil of the plant.