Stone or gravel mulch has its place. It lasts a long time so it doesn’t need to be topped up regularly and it is the least flammable mulch so if you live in an area with fire risk, stone is going to be a great option. However, weeds do grow through it and pulling weeds out of the stone mulch is very difficult and time consuming. Stone does not break down and decompose so it does not feed your soil as well as a wood mulch would. Stone does heat up and radiate heat and certain plants don’t want to