Bulbophyllum longissimum is also known as The Long Petaled Bulbophyllum.
Synonyms:
Cirrhopetalum longissimum Ridl. 1896.
Found in Thailand, Myanmar, Borneo and Malaysia at lower elevations as a small sized, hot to warm growing epiphyte with 5 to 10 fragrant flowers that are short-lived
Light:
It needs bright light simular to Cattleyas, a light level of 35000-40000 lux. Full sun early in the morning is good and the rest of the day shade but not deep shade.
Temperature:
From 35°C at daytime to 24°C at night during the summer, 27°C at daytime to 16°C during the night in the winter.
Humidity:
Humidity fluctuates between 70% and 90% during the day. At the height of the dry season humidity might go down to 50% for a few hours a day but climbs over 70% at night. At the height of the wet season it can stay close to 100% during the night.
Substrate, growing media and repotting:
Bulbophyllum longissimum grows best in basket or pot with fine bark. They can also be kept mounted on bark with some sphagnum.
Watering:
During the summer give this plant every single day plenty of water, the media stays constantly be wet for months. During the dry season, if it is not growing, give it a soaking once a week or a bit more frequently if the bulbs start to become furrowed.
Fertilizer:
A fertilizer with a high nitrogen content, one times a week when it is producing new growths. Stop fertilizing when the new growths achieve mature size. Don’t fertilize if the plant is not producing either new growths or roots.
Rest period:
Reduce watering and stop fertilizing in the winter.