Fresh from the lumber mill, our barkdust is completely organic. There are no pesticides, herbicides or heavy metal residue to contaminate your soil or being. Barkdust is a valuable organic material that improves the soil structure by adding small amount of most minerals and nutrients. Barkdust provides the organic material micro organisms need to break down the nutrients and make those nutrient available to your plants. Barkdust will also protect the soil and the roots of your plants from the hot sun in the summer and rapid freezing and thawing in the winter.