In this work, self-organizing memristive systems are presented that are composed of electrochemically grown silver dendrites, and the influence of the concentration of the electrolyte, the voltage, and pulse characteristics is investigated. The overall context is the electrochemical memristive device and its potential for neuromorphic computing due to its ability to create conductive paths via ion migration and redox reactions. Planar two-terminal devices with Ti/Au electrodes, having a distance of about 25 μm between them, were fabricated using standard microfabrication procedures. A solution of AgNO3 in DMSO was drop-cast on the gap between the electrodes to create a localized liquid electrochemical cell.