Cymbidium orchids are known for their specific requirements when it comes to sunlight and shade. These beautiful plants thrive in bright but diffuse light, and they should be carefully protected from prolonged direct sunlight. Let’s explore the ideal sunlight conditions for growing healthy, blooming Cymbidium orchids.
Ideal Sunlight Conditions
Bright but Diffuse Light
Cymbidium orchids thrive in bright but diffuse light, which can be achieved by placing them under a pine tree or shrub in the early morning or afternoon. This type of filtered light allows the plants to receive the necessary intensity without the risk of leaf burn.
Filtered Light
Cymbidiums need good, strong filtered light to perform at their best. They should not be exposed to too much direct sunlight, as this can be detrimental to their growth and flowering.
Moderate to Bright Light
The ideal light conditions for Cymbidium orchids are moderate to bright, which can come in the form of good morning sun or bright, “dappled” afternoon shade.
Avoiding Direct Sun
No Prolonged Direct Sun
Cymbidium orchids should not be exposed to prolonged direct sunlight, as the leaves will burn and produce unsightly black spotting.
Shade in Spring, Summer, and Autumn
These orchids need to be shaded during the spring, summer, and autumn months. A great balance can be achieved by placing them under a 50% shade cloth.
Indoor Lighting
South, East, or West Windows
When growing Cymbidiums indoors, south, east, or west-facing windows where they will receive about 4 or more hours of direct sun are ideal.
Artificial Lights
If using artificial lights, they should be on for 10 to 14 hours per day to provide the necessary illumination.
Temperature and Humidity
Cool Conditions
Cymbidium orchids are native to the foothills of the Himalayas and are accustomed to cool conditions.
High Humidity
These orchids benefit from high humidity, which can be achieved at home with the use of a humidifier or a humidity tray.
Watering and Fertilization
Moist Growing Medium
Cymbidium orchids enjoy a moist growing medium at all times, but the media should never become “bone dry.”
Frequent Watering
They should be watered frequently and heavily during the active growing season, and less frequently during the winter months.
Fertilization
Use a weak solution of orchid fertilizer and follow the package directions. Avoid high-nitrogen fertilizers, as they promote leaf growth but not flowering.
Potting and Repotting
Light, Porous Medium
Cymbidium orchids thrive in a light, porous medium that can hold moisture while still draining thoroughly when watered.
Repotting
Repot every 2 to 3 years in the spring when new growths are visible and at least 3-4 inches tall.
Troubleshooting and Pest Control
Pests
Cymbidiums can be susceptible to aphids, spider mites, and scale. Use horticultural oil or Neem oil for effective pest control.
Pruning
Prune away any browning roots and any leaves that are dying or dead.
Propagation
Division
The easiest way to get new Cymbidium plants is to separate the newer bulbs from the parent plant. This division is best done in the spring.
Longevity
Long-Living Plants
Cymbidiums are among the longest-living plant species, with many surviving 15 to 20 years.
Common Mistakes
Too Much Shade
Most growers fail to get flowers because their Cymbidium orchids are in too much shade.
Too Little Water
Insufficient watering will also greatly reduce the chance of flowering.
Expert Tips
Monitor Roots and Leaves
Healthy, thick white roots and a nice light shade of green indicate a healthy Cymbidium orchid.
Balance Light and Temperature
Balancing the light requirements with the temperature needs of Cymbidiums can be tricky, but it’s essential for their optimal growth and flowering.
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