Cymbidium orchids are known for their exotic, long-lasting blooms and can thrive outdoors with the right care. If you’re growing these beautiful plants outside, here are the key considerations for their light, temperature, and watering needs.
Light Requirements
Direct Sunlight
- Cymbidium orchids need bright, but diffused light. Avoid exposing them to direct sunlight, especially during the hottest parts of the day, as this can cause leaf burn and black spotting.
- Instead, place your Cymbidium orchids under the canopy of a pine tree or shrub to provide filtered light.
Shade
- Provide afternoon shade to prevent your Cymbidium orchids from overheating. A southeast- or east-facing window is ideal if growing them indoors.
Temperature Preferences
Daytime Temperature
- Maintain daytime temperatures between 10°C to 24°C (50°F to 75°F) for optimal growth.
Nighttime Temperature
- For flowering, Cymbidium orchids require a distinct drop in nighttime temperature. Aim for temperatures around 10°C to 14°C (50°F to 57°F) during the night.
Watering Needs
Frequency
- Water your Cymbidium orchids regularly, but ensure the potting medium does not stay wet for too long. Reduce watering frequency in the winter when the plant is dormant.
Water Quality
- Use rainwater or filtered water whenever possible to avoid mineral buildup. Water from above, allowing excess water to drain out quickly to prevent root rot.
Fertilization
Fertilizer Type
- Use a high-potassium specialist orchid fertilizer during the summer and autumn to stimulate flowering. In spring, switch to a half-strength general liquid fertilizer or orchid-specific formula.
Fertilization Schedule
- Fertilize every time you water during the active growing season in summer. In winter, fertilize every other watering.
Potting and Repotting
Potting Mix
- Use a light, porous medium like bark-based orchid compost that can hold moisture while draining thoroughly upon watering.
Repotting
- Repot your Cymbidium orchid every two years, or sooner if the plant has outgrown its pot. Divide the plant into several new plants by sawing through the clump and rootball if necessary.
Troubleshooting
Pests and Diseases
- Watch for pests like slugs, snails, aphids, mealybugs, scale, and spider mites. Fungal diseases can be avoided with well-draining soil and proper airflow.
Brown Spots
- Brown spots can indicate a lack of water or viral infections. Ensure consistent moisture and inspect for signs of disease.
By following these guidelines, you can create an ideal outdoor environment for your Cymbidium orchids to thrive and produce their stunning blooms.
References:
1. RHS. (n.d.). How to grow cymbidium orchids. Retrieved from https://www.rhs.org.uk/plants/cymbidium-orchids/how-to-grow-cymbidium-orchids
2. OrchidWeb. (n.d.). Cymbidium Orchid Care. Retrieved from https://www.orchidweb.com/cymbidium-orchid-care
3. Ultimate Backyard. (2023). How to Grow and Care For Cymbidium Orchids. Retrieved from https://www.youtube.com/watch?v=30Hv55J_5Vs
4. The Spruce. (2023). How to Grow and Care for Cymbidium Orchid (Boat Orchid). Retrieved from https://www.thespruce.com/grow-cymbidium-orchids-1902836
5. Smithsonian Gardens. (n.d.). Care of Cymbidium. Retrieved from https://gardens.si.edu/collections/plants/orchids/orchid-care-sheets/cymbidium/