Moss Grows Everywhere, Not Just on the North Side of Trees
The north-side moss idea has a kernel of logic. In the Northern Hemisphere, north-facing surfaces receive less direct sunlight and tend to stay damper, which moss prefers. In open terrain with consistent sun exposure, this can sometimes produce a slight directional bias. But in a dense forest, where the canopy diffuses light from every direction and shade is omnipresent, moss grows wherever moisture accumulates – on all sides of trunks, on fallen logs, on rocks, in depressions. It follows water and humidity, not compass bearings. Navigating by forest moss is not just unreliable, it’s dangerously unreliable because it gives you a false sense of directional confidence. Use a compass, use the sun’s arc, use the stars. Moss is a beautiful organism. It is not a navigation instrument.