On average, how thick should mulch be spread?

Answer: 3-4 inches
Explanation: 3"-4" helps prevent weeds, also last longer and the following you only need a 1" spread or in some cases just raked out if the client prefers

Answer: 2-3 inches
Explanation: It depends on the depth of the mulch bed and the contour of the ground.

Answer: 1-2 inches
Explanation: We charge by the cub yard and we can get the mulch around a 1in thick with our mulch blower just enough to cover up the old mulch. If its a new garden bed than we would install mulch at a depth of 3-4in.