Root Simple reader Donna, in response to my post on decomposed granite as mulch, alerted me to a related phenomenon: the infamous mulch volcano. For whatever reason, I don’t see this viral gardening phenomenon much here in Los Angeles but it’s really common elsewhere in the US.
Mulch volcanoes are generally considered to be a bad idea. It’s thought that the lack of air circulation at the base of the tree can lead to disease problems and you don’t want roots to grow up into the mulch so close to the trunk. When applying mulch you should keep it a few inches away from the base of a tree.
How strange gardening practices, such as mulch volcanoes, get started is really interesting to me. Mulch volcanoes remind me of miniature versions of minimalist art earthworks or Native American mounds. Is the mulch volcano a kind of outsider landscape art? Is the mulch volcano a misguided attempt at putting a human imprint on nature, what landscape architects call “clues to care?”