Fir Sawdust Fir Sawdust and Shavings are Used as a soil additive or amendment to the soil mix. Also used for pet and livestock bedding. Screened shavings and sawdust from Milled Douglas Fir and Pine. Fir Sawdust is the most commonly used as soil additive and an important ingredient in custom garden and landscape blends. Works well in blends needed to amend clay-based soils.
