In addition, standard cymbidiums, or the large-flowered varieties, require a six to eight week cool period in the fall when night temperatures are at least 45 to 50 degrees Fahrenheit, or even down to freezing, to form buds. These plants thrive in 50 to 80 percent relative humidity. To increase humidity, run a room humidifier or place the pot on a tray filled with pebbles and water. Keep the water level in the tray below the bottom of the pot to prevent water wicking into the pot which, over time, may lead to root rot. Fertilize these orchids frequently when new growth is forming, generally from spring through summer, with a water-soluble commercial orchid fertilizer.
Cymbidiums bloom only once a year and the season of bloom varies by species or hybrid.
Repot these orchids every two to three years when new growth begins, generally in spring. Mealybugs and scale Insects are occasionally attracted to cymbidiums. They are also susceptible to viral infections and root rot. Permission is hereby given to duplicate this Plant talk Colorado TM script as is if credit is given to the sources.