Cymbidium orchids are a popular choice for outdoor cultivation, known for their stunning, long-lasting blooms. However, successfully growing these orchids outdoors requires careful attention to their specific light, watering, and temperature needs. In this article, we’ll dive into the key considerations for cultivating thriving Cymbidium orchids in an outdoor setting.
Ideal Light Condition
Cymbidium orchids prefer bright, but diffused, light conditions. The ideal setup is to place them under the canopy of trees, such as pine trees or shrubs, where they can receive filtered light, especially in the early morning or late afternoon. Avoid exposing them to direct sunlight, as this can lead to leaf burn and black spotting on the foliage.
Watering
Maintaining the right balance of moisture is crucial for Cymbidium orchids grown outdoors. Keep the soil consistently moist, but not waterlogged. The watering frequency will depend on the climate:
- In cooler weather, water the plants about once a week.
- During hot, dry periods, water every other day or even daily.
Regardless of the climate, be sure to avoid getting water on the plant’s crown, as this can lead to root rot.
Temperature Range
Cymbidium orchids thrive in cool temperatures. The optimal temperature range is:
- 45-50°F (7-10°C) at night
- 65-75°F (18-24°C) during the day
These orchids can tolerate light frosts, but temperatures below 35°F (2°C) can be detrimental to their health.
Fertilization
To support the healthy growth and blooming of your Cymbidium orchids, follow this fertilization schedule:
- Spring and Summer: Use a high-nitrogen fertilizer (30-10-10) every two weeks during the active growth season.
- Fall: Switch to a high-phosphorus fertilizer (10-30-20) to encourage the development of bloom spikes.
Potting and Repotting
Cymbidium orchids prefer a well-draining potting mix, such as a medium-grade fir bark blend with peat moss and perlite. When it’s time to repot, do so after the plant has finished blooming, dividing the pseudobulbs if necessary. Ensure the active growing pseudobulb is placed farthest from the side of the pot.
Troubleshooting Tips
Brown Spots
Brown spots on the leaves can indicate a lack of water or the presence of viral infections. Maintain consistent moisture levels and inspect the plant for any signs of viral infections, which may require destroying the affected plant.
Pest Control
Monitor your Cymbidium orchids for common pests, such as mealybugs, scale, thrips, and red spider mites. Use appropriate fungicides and pest control products as needed to keep these issues at bay.
Additional Tips
Air Circulation
Ensure good air movement around your Cymbidium orchids to reduce the risk of fungal and bacterial problems. Keep the pots elevated off the ground to assist with air circulation and drainage.
Humidity
Maintain high humidity levels, which can be achieved by using a humidifier or placing the pots on a humidity tray. Avoid standing water, as this can lead to root rot.
By following these guidelines for light, watering, temperature, and care, you can successfully grow thriving Cymbidium orchids outdoors and enjoy their beautiful, long-lasting blooms.
References:
1. The Spruce: How to Grow Cymbidium Orchids
2. YouTube: Cymbidium Orchid Care
3. UC Agriculture & Natural Resources: Cymbidium Orchid Care
4. Searles Gardening: How to Grow Cymbidium Orchids
5. Orchid Web: Cymbidium Orchid Care