These wood chips went down on April 18th and I was planting 6 weeks later. How long it takes will depend on the time of year, the amount of chips and how hot it is. I learned about this method and amount to use from Linda Chalker-Scott, a professor at Washington State University. (Support and celebrate our scientists!!) I use it for mulch, paths and killing grass. It’s often free—mine were and many tree service companies need to pay for disposal so it’s a win-win. These came from Derek Binding T