oya montana is an intriguing Hoya species, and its name, "montana" (meaning "of the mountains"), provides a clue to its habitat.
The primary native range of Hoya montana is New Guinea.
It grows as an epiphyte (on trees) and primarily thrives in the wet tropical biome. While the name suggests "mountains," and it's found in wet tropical biomes which can include mountainous regions, its specific altitudinal preference within New Guinea may vary. However, the "montana" in its name likely refers to it being found in the higher elevation, wetter, and often cloudier forest environments characteristic of tropical mountains.