Barkdust

Barkdust being used as mulch.

In agriculture, gardening, and landscaping, barkdust (also bark dust, bark chips, bark mulch, beauty bark, tanbark, tan bark, or simply bark) is a form of mulch produced out of chipped or shredded tree bark. Coarser forms of barkdust may be known as bark nuggets. Trees typically used in the production of barkdust include the Douglas fir and the Western hemlock.