More important than the “What kind of mulch is best for me?” question is the question of “To mulch, or not to mulch?” To varying degrees, mulch materials retain moisture in soil, prevent erosion from wind and water, insulate soil from extremes of heat and cold, increase nutrients in the soil by creating a comfortable microclimate for beneficial insects and mycelium, and combat/prevent (some) invasive weeds. The PermaDesign team has used more different forms of mulch than we might like to admit, and we’ll gladly recommend the material that we think is best for you—before the delivery truck arrives.