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There are many types of orchids. Some originate from cooler climates and will react favorably to a lower temperature, while others favor warmer climates and temperatures. Generally, if the orchid owner is comfortable with the temperature at the orchids' location, then the orchid is also likely to do well. A temperature range between 55°F to 80°F is acceptable for many orchids to thrive.

For many varieties of orchids, a fluctuation in temperature between day- and night-time temperatures will be beneficial for them. This temperature fluctuation, which mimics their natural environment, acts as a trigger to cause orchids to bloom.

Orchids that have been shipped during winter or peak summer may also suffer from temperature extremes while in transit. Fleshy orchid leaves will freeze easily, and when exposed to prolonged heat, the leaves will turn yellow or brown and fall-off. If you are thinking of purchasing orchids that will be have to be shipped in cold weather, wait for a couple of days after the orchids arrive to see if cold damage appears in the foliage.

If outside temperatures are too extreme for your orchids, move them indoors where you can better regulate the temperature. You'll need good air ventilation because this encourages the circulation of carbon dioxide which they need to thrive.

What Can You Do to Keep the Temperature Optimal for Orchids?

Winter notes: Consult the culture notes for your orchids. The notes will give you the optimal temperature ranges. As previously mentioned, some orchids (like Cymbidiums) can survive in colder weather. Most other types will not grow well in colder temperatures, and you should bring them indoors as temperatures drop. When it is freezing weather outside, make sure the orchid foliage does not touch the window glass. A thermometer will tell you if the temperature close to the window is too cold.

Summer notes: If the outdoor temperature is too hot, move the orchids to a covered area, away from direct sunlight where they will still receive strong indirect light. Move them to a spot where there is good air circulation that will help cool the orchids. Check the moisture levels in the media frequently to ensure adequate watering. Indoors, use a fan to increase air flow and help the orchid's natural evaporation process-this is how plants lower their own temperature. Good air circulation will also help evaporate moisture on the leaves so that they are dry by evening.

Michael Anderson is co-author with Steve Frowine (author of four orchid books including the Orchid title of a well known series) of the web site, UncutOrchids. To get a free, 40-part video course on orchid care and the Orchid of the Day newsletter, click now on this URL: UncutOrchids [UncutOrchids]. Michael lives in the enchanting town of Guanajuato, Mexico, where he also offers to vacationers and visitors.