Introduction
Cymbidium orchids are known for their ability to tolerate some frost, but they are not entirely frost-tolerant. Proper care and protection are essential to ensure the health and well-being of these beautiful plants, even in the presence of frost. In this article, we’ll explore the key considerations for managing the frost tolerance, temperature requirements, light exposure, and humidity levels of your cymbidium orchids.
Frost Tolerance
Cymbidium orchids can take light frosts and even benefit from a bit of frost. However, prolonged exposure to freezing temperatures can cause significant damage. The plants may develop squishy, brown, lifeless-looking pseudobulbs (the swollen stem bases) and blackened leaves, indicating cold damage.
Ideal Temperature Ranges
These orchids thrive in temperatures between 50-55°F (10-13°C) at night and 60-75°F (15-24°C) during the day. They require cool night-time temperatures to bloom successfully.
Protecting from Frost Damage
To protect your cymbidium orchids from frost damage, consider the following strategies:
- Bring plants indoors when temperatures begin to drop to near freezing.
- Use frost cloths, blankets, or towels to cover plants if they must remain outdoors.
- Mulch around bedded orchids to provide insulation.
Preventing Cold Damage
In addition to protecting your plants from frost, you can take the following steps to prevent cold damage:
- Keep plants away from direct sun and excessive heat, which can exacerbate the effects of cold temperatures.
- Water sparingly and avoid over-watering, as wet plants are more susceptible to cold damage.
- Fertilize lightly and avoid using tap water, which may contain minerals that can harm the plants.
Potting and Watering
Cymbidium orchids thrive in a light, porous potting medium that holds moisture and drains well. Water the plants frequently during active growth, but reduce watering during the winter months.
Fertilization
Use a specially formulated orchid fertilizer and follow the recommended dosages. Fertilize every time you water during the summer and every other watering during the winter.
Humidity
Maintain high humidity around the plants, which can be achieved using a humidifier or a humidity tray.
By following these guidelines, you can ensure the health and well-being of your cymbidium orchids, even in the presence of frost.