The Enrich Bark is made from 100% natural bark, giving it a mid to dark brown appearance. It's graded to 30mm for consistency and to remove any oversize particles. This product improves the appearance of trees and shrub beds with its natural color. It also suppresses weed development by forming a blanket over the soil surface, preventing water loss and improving plant vigour. Over time, it decays to provide a source of slow release nutrients to the soil and plant, and insulates plant roots from frost.