Mulching, in itself, does not attract termites to your home. That’s the conclusion of two university studies. Soil moisture appears to be the key factor that attracts termites to the home. The subterranean termites found in scattered, localized areas are routinely found in wood chip mulch.
While landscape mulches are good for woody and herbaceous plants, they’re admittedly favorable for termites and other insects as well. Soil moisture favors termite exploration, tunneling and feeding.
University of Maryland entomologists found that termite populations were detected beneath many kinds of mulches, including eucalyptus, hardwood, pine bark, and pea gravel. However, termite activity was significantly higher beneath the gravel mulch. Scientists concluded that termite activity is more about a suitable habitat.
A University of Florida study reported that termites can be found in mulch, but their survival is poor. Why? – because the ability of termites to survive the chipping process that manufactures mulch is not good. Mulch-fed termites suffer significantly lower survivorship.
Overall recommendations: Keep mulch 12-18 inches away from the house foundation. Termites do need a cellulose materials like mulch to feed on. Always watch for signs of termites and their location (activity) around your home.