General Orchid Temperature Requirements
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In this post I give the general temperature requirements for orchid plants. But please keep in mind that each orchid has its own cultural requirements (see the many posts I’ve created on this blog for plant specific growing guidelines).
There are cool-growing types which require a minimum temperature of 50 degrees F (10 degrees C) and at the other end of the scale the tropical-growing ones need a minimum of about 63 degrees F (17 degrees C). As a general rule your orchids will thrive at a temperature where you are comfortable (ideally there should be a 50-59 degree F (10-15 degree C) difference between the day and night temperature). Most types benefit from a spell outdoors between June and September in a sheltered spot out of the sun.