Decorative Bark and Bark Mulch consist of products mechanically screened and/or shredded for uniform size containing 100% of the named material of which at least 85% is bark per product.

Mulch products consist of 100% bark and wood products (excluding the use of any reprocessed wood products) mechanically screened and/or shredded containing at least 70% of the named material per product.  Mulch Blends consist of bark, wood products or reprocessed wood products mechanically screened and/or shredded that exceed any limits for Decorative Bark and Bark Mulch Products by virtue of genus mix or particle size. 

Mulch blends must be labeled as a mix or blend.  If a specific material is used in the product name, it must comprise at least 51% of the total volume.  If reprocessed wood products are used in any portion of a blend, such use must be indicated on the product label and shall not contain hazardous materials above limits established by the Environmental Protection Agency.

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