Paphiopedilums, commonly called lady slipper orchids, perform best in moderate to low light situations, such as an east or north window, or in diffused sunlight or under broad-spectrum fluorescent lights. Use a commercially available potting mix for terrestrial orchids or make one comprised of medium to fine grade redwood bark chips, granulated charcoal, coarse peat moss and perlite. Paphiopedilums have fewer roots than other orchids and are very susceptible to root rot, so it is important that the potting mix drain very well.
This orchid variety performs well in typical household temperatures. Plants with patterned or mottled leaves like temperatures at 65 to 70 degrees Fahrenheit during the day and 58 to 60 degrees at night. Plants with plain green leaves generally require cooler conditions. These orchids will thrive in 50 to 80 percent relative humidity. Use a humidifier or place the pot on a tray filled with pebbles and water to increase humidity.
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.
When new growth is forming, fertilize monthly with a water soluble, commercial orchid formulation; or use a 20-20-20 formulation.
Paphiopedilums generally bloom only once a year, but the season of bloom varies by species or hybrid. Repot these orchids every two to three years when new growth begins.
Mealybugs and scale Insects occasionally bother paphiopedilums. They are also susceptible to viral infections and root rot.
For more information, please see the PlantTalk script #1349, Orchid: Paphiopedilum.
