Mycorrhizae for Oaks: Worth the Cost or Just Mulch?

Evaluating Tree Inoculation Services

A tree service proposes inoculating root zones with mycorrhizal spores and biostimulants to improve nutrient uptake and drought resistance. Are these treatments necessary?

When Mycorrhizae Help

Mycorrhizae are beneficial soil fungi that aid water and nutrient absorption. They're most helpful for young trees in poor soil. For mature oaks in established landscapes, benefits are uncertain—you can't easily test if your soil lacks them.

Natural, Cheaper Alternative

Maintain a 2-inch layer of mulch (shredded leaves are ideal for oaks) out to the branch tips. This naturally supports fungal communities and provides biostimulants as it decomposes.