The benefits of mulch in the growing beds of a potager are pretty obvious, but we shouldn't forget just how nice it is to have a good, deep mulch on the main paths as well. We got 4-5 inches of rain over the course of two days last week, and during one particular downpour that benefit became especially clear. I have been in the process of renewing the path mulch as part of my spring maintenance, and last weekend I only had time to get about half the garden done. In this picture it is pretty easy to tell which part!
Look at the growing bed in the right foreground for a sense of just how soaking a rain it was. At one point the center background path was flowing water, lifting silt from the unfinished part of the garden in back (more on that at some point) and washing it down the path (spreading weed seed as it went, no doubt...). But the deeply mulched parts of the path never even showed a wet surface; it was clean walking and no erosion throughout the whole storm. Today I am definitely going back to the landfill for that last load!