Do most orchids have bloom triggers like temp or light?

[murph7]

This is an area of interest for commercial growers, so research has been done on the most commercial orchids. A quick search in Google Scholar gives a lot of reading material.

[nogreenthumbs]

Murph and Bulbo, thanks for the info. I should have hit refresh before I responded to Ray, then I could have caught all of you in one post. This is all good info.

[estación seca]

Night length can be a trigger; temperature can be a trigger; water pattern can be a trigger; barometric pressure drop can be a trigger. It varies from species to species.

Most plants growing close to the Equator don't have a night length trigger, because there is so little variation.

Rain seasonality is a big trigger to a lot of plants from areas with dry winters and wet summers.

At least one orchid, Dendrobium crumenatum, is triggered to bloom by the drop in barometric pressure with thunderstorms.

[nogreenthumbs]

Interesting stuff, ES!