Is black mulch harmful to plants? Is the dye in the mulch toxic? - Cooperative Extension: Garden and Yard - University of Maine Cooperative Extension

Question: Is black mulch toxic to plants? I believe that several plants in my flower garden have been stunted or killed by the black mulch that was placed around them. If the mulch can be ruled out as the cause, I will investigate other possibilities. Is the dye toxic? Answer: Liz Stanley, Horticulture Community Education read more