Discovering unusual growths in your backyard can feel alarming, especially when dark, finger-like structures appear in garden mulch. These strange formations often raise concerns, but they are commonly a harmless fungus known as Dead Man’s Fingers. Despite the unsettling name and appearance, understanding what they are can quickly replace worry with curiosity.Dead Man’s Fingers, scientifically called Xylaria polymorpha, is a fungus that feeds on decaying wood. It typically grows in clusters from buried logs, tree stumps, or wood-rich mulch. The structures are usually black or dark brown, elongated, and may resemble small fingers emerging from the soil. When young, they can appear lighter in color before darkening and becoming firm and woody as they mature.

This fungus thrives in damp, shaded areas with plenty of decomposing organic material. Because many garden beds contain wood chips, conditions are often ideal for its growth. Seasonal moisture, especially during cooler or wetter periods, can encourage its appearance. Importantly, Dead Man’s Fingers does not harm healthy plants, pets, or people. It plays a beneficial ecological role by breaking down dead wood and returning nutrients to the soil.If you find it in your yard, there is usually no need for concern. You may leave it in place or remove it for aesthetic reasons, wearing gloves if desired. Reducing excess decaying wood and improving drainage can help limit future growth. When uncertain about identification, consulting a local expert is always a helpful option.