All Treat cedar bark mulch is a natural, un-dyed product. The fibres of cedar bark mulch have an incredible ability to mat and knit together to form an effective barrier against weeds. This property also makes it the number one choice for using on steep slopes where erosion form wind and rain are a concern. Over time, this mulch turns into the beautiful silver colour of aged cedar. Apply to a depth of 2”-3” to suppress weeds and retain moisture.