We have had this orchid in our collection since the 1990s and it is still lovely each year when its little clog like flowers open.
Bulbophyllum frostii is native to Vietnam and Southern China where it is recorded at around 1500m. We have explored similar habitat in nearby Laos where plants experience warm wet summer and dryer cooler winters. We grow the species high in our cloud forest greenhouse where conditions above our Masdevallias as bright and warm.
Plants are compact with neat bulbs and fleshy leaves and seem to enjoy growing mounted or in baskets where they can twine around. In pots they have a tendency to walk out of the pot and try to grow with their neighbour.