| I have asked a related question on several other threads - since a majority of the numbers of orchids live near the equator I would presume that there is NOT a seasonal photoperiod for many. My phals for example seem to do great with 16 hours of artificial light year round - spiking right on schedule (now). There are probably others, but some types of paphs (at least the complex ones) seem to be flower bud triggered by declining amounts of daylight. Some other types of paphs I have seem to be more tolerant of continued lighting periods. |