Orchids, like many other plants, can enter a dormant phase, especially during winter. Dormancy is a natural survival mechanism where the plant slows its growth to conserve energy during unfavorable conditions. While not all orchids go dormant, many popular varieties, such as Phalaenopsis (moth orchids) and Cattleya, exhibit reduced activity in colder months. During this period, the plant may stop producing new leaves or flowers, focusing instead on root and energy storage.
Recognizing dormancy is crucial to avoid misinterpreting it as a health issue. Common signs include:
Proper care during dormancy ensures your orchid thrives when active growth resumes. Key practices include:
Overwatering dormant orchids is a common mistake. Reduce watering to once every 2–3 weeks, allowing the potting mix to dry completely between sessions. Use room-temperature water to avoid shocking the roots.
Winter days are shorter, so provide bright, indirect light for 10–12 hours daily. Move orchids closer to south- or east-facing windows, but avoid cold drafts. Supplemental grow lights can help in low-light areas.
Most orchids prefer daytime temperatures of 65–75°F (18–24°C) and nighttime drops of 10–15°F (5–8°C). Avoid placing plants near heaters or cold windows. Maintain humidity at 40–60% using a humidifier or pebble tray.
Since growth is minimal, withhold fertilizer during dormancy. Resume feeding at half-strength when new growth appears in spring.
Dormant orchids are vulnerable to pests like spider mites or fungal infections. Inspect leaves and roots regularly, and treat issues promptly with insecticidal soap or fungicides.
Not all orchids behave the same in winter. For example:
As daylight increases in late winter, gradually reintroduce regular care. Increase watering slightly, resume fertilizing, and watch for new shoots or flower spikes. Repotting, if needed, should wait until active growth resumes.
