Whew, it’s a hot one! Wondering what it feels like to be a plant? Here is a very unscientific comparison of what a plant surrounded by decomposed granite feels like vs mulch. As you can see the temperature is much hotter than we record 6′ off the ground and in the shade. This particular day the forecast high was 108. The temperature of the ground covered with granite is approaching 130 degrees, while the mulch while still very warm is 12 degrees cooler. Twelve degrees on top of the soil would be even a bigger difference under surface a few inches. If you plants look a little heat stressed, now you know why and one of the first things you should do is get the d.g. out of the way and replace it with some kind of organic mulch or compost!
About Jay Harper
I am a 3rd generation native Arizonan and my brothers Jeff and Jerry and I are the 3rd generation to own and operate Harper's Nursery and Landscape Company inc. Being born and raised in the landscape/gardening business in such a unique gardening environment as the Arizona desert, gives us a unique position and outlook on how to be successful gardeners in this area.