Colour Enhanced Mulch is free of harmful toxins. It is safe for plants and animals, and its colours are those that are naturally occurring on the Earth’s surface. It is screened to be a 1″ minus size. The colourants used for this vibrant mulch are specially engineered to bond with the fibres of the mulch, which promotes colour adhesion. Typically, coloured mulch retains its colour for longer than one year, especially if routinely raked. Coloured mulch comes in Black and Red colours.