This little trick can mean the difference between an orchid plant that merely lives, and one that thrives and flowers. To measure temperatures accurately, invest in maximum-minimum thermometers, which are recommended for evaluating the environment of microclimates. Orchids are usually classified as warm growing, intermediate and cool growing, with regard to their temperature needs. Many tolerate exposure to warmer or cooler temperatures without suffering damage. The temperature groupings refer to the lowest temperature the orchid prefers during winter nights.
Most orchids require plenty of light, preferably at least six hours a day.
Many orchids can withstand more or less than the amount of recommended light, but providing more light enhances flowering potential. Conversely, inadequate light prevents orchids from flowering, although they will grow. Leaf color indicates if the amount of light is adequate. The lush, rich, dark green of most houseplants is not desirable in orchid leaves. Dark green leaves are attractive, but signal there is not enough light.