Inducing blooms in bulbophyllums

[King_of_orchid_growing:)]

There are really two triggers. Temperature differentials and light. There are no other special tricks.

The temperature difference between seasons, and temperatures between night and day.

Lighting has to be strong enough.

Watering less or more will not do anything to get then to bloom.

Just waiting is the only other thing to do.

---------- Post added at 01:14 PM ---------- Previous post was at 12:59 PM ----------

Originally Posted by CourtneyT

My Bulb has the same problem. I helped grandma divide her Bulb and got some pieces mounted in early 2016. Each division had about 2-3 pseudobulbs at that time. It has been 2 years since than. A lot of new growth, but no blooms. I only watered it twice a week. It got totally dried out in between. I'm wondering if that's my reason of not blooming. Or maybe it's still not fully matured.

3 or 4 bulb divisions usually do not bloom so readily. Once they get to anywhere around 6 - 7 pseudobulbs, they tend to bloom more readily if lighting is adequate and if there is enough of a temperature difference between night and day and between the seasons. The temperature differences should be 10 F - 15 F.

[Subrosa]

Originally Posted by King_of_orchid_growing:)

There are really two triggers. Temperature differentials and light. There are no other special tricks.

The temperature difference between seasons, and temperatures between night and day.

Lighting has to be strong enough.

Watering less or more will not do anything to get then to bloom.

Just waiting is the only other thing to do.

---------- Post added at 01:14 PM ---------- Previous post was at 12:59 PM ----------



3 or 4 bulb divisions usually do not bloom so readily. Once they get to anywhere around 6 - 7 pseudobulbs, they tend to bloom more readily if lighting is adequate and if there is enough of a temperature difference between night and day and between the seasons. The temperature differences should be 10 F - 15 F.

The seasonal variation in photoperiod can also be a trigger for blooming, as well as the intensity. This would likely become less critical the closer the plant's natural habitat is to the equator, where seasonal variation in day length is less pronounced. I suspect that the shortness of the days during the winter at 40°N doesn't help. Can you supplement natural light with artificial during the winter? Giving light at the beginning and/or end of the day to lengthen the plants' day to 12 hours or so might help.