Dendrobium uniflorum orchid

Dendrobium uniflorum, it is native to Southeast Asia.  I have attached it to driftwood, watering twice a day in the morning and afternoon during summer season. But for cold season I watered it every other day, and one to two times a week during rainy season. It has mild sweet scent. I positioned it in morning sunlight from 7am-12nn. Bought it last year of summer from Laguna with few thin pseudobulbs but now they multiplied already but gave me few flowers only.