MIGHTY109 Premium Doug Fir Bark 48 quarts big box 100% Natural Bark From Doug Fir Trees. 48 quarts Great in landscapes around plants and pathways Natural, durable material for creating appealing flower beds and garden areas Keeps soil covered, replicating the natural mulching and decomposition process that occurs in undisturbed woodland settings. Helps prevent soil erosion, regulate soil temperatures, reduce weed growth and conserve moisture