Lah’mu was an inaccessible planet located in the Raioballo sector of the galaxy’s Outer Rim Territories, far from major hyperspace routes. Its planetary rings were primarily silica formed from the remains of one of the planet’s ancient moons, pulverized long before the Clone Wars. Lah’mu retained one other natural satellite.

The planet itself was lush and dark green in color, and its biosphere transformed iron into chlorophyll. The climate was rainy. The planet’s crust, which split numerous times during its early geological life, was fertile and rich with minerals and soils brought to the surface during this turbulent period. These substances, including zinc, chlorine, cobalt, nitrogen, and boron, rendered the groundwater unpleasant to drink, despite the presence of an abundant hydrosphere. Further, volcanic tephra contaminated the greenery. Part of the reason for the rainfall and high mineral content was due to heavy volcanic and geothermal activity, especially in the Eastern hemisphere.

Verdant and tranquil, Lah’mu’s surface hosted mountain peaks and plateaus, including some volcanoes, black sand beaches, saline seas, geysers, and farmlands. Settlers lived on the western hemisphere, particularly around the fertile lowlands.