Moles in Gardens: A Surprising Benefit? By reducing these pest populations, moles lower the risk of root system damage for various crops. High Groundwater Levels: In overly saturated conditions, tunnels may facilitate water accumulation around the roots of specific crops. Evaluating the Balance of Benefit versus HarmDetermining whether to remove moles depends on the physiological state of the vegetation. When young roots remain intact, moles contribute to soil aeration; if damage is observed, relocation methods become necessary.