Hoya vangviengiensis flowers are powerfully scented and last over a week. They drip small amounts of nectar. Here are the conditions under which it flowered. The night time temperatures would dip down to as low as 57 degrees Fahrenheit with day time highs reaching about 72 degrees. The day cycle was 12 hours of a strong LED light made by Mars Hydro with a manufacture date of 2021. I watered very sparingly, keeping it far drier than in previous years. Humidity was always high never going below 70% except when I opened the tent door. I fertilized lightly every time I watered.