What to Do When Azaleas Shed Leaves in Winter
As the winter arrives with the howling north wind, many flower enthusiasts find that their beloved azaleas begin to shed leaves in large numbers. As a typical acidic plant highly sensitive to temperature and humidity, the winter care for azaleas requires special attention. This article will analyze the causes of leaf shedding from a scientific perspective and provide actionable solutions.
One, In-depth Analysis of the Causes of Winter Leaf Shedding
1.1 Sudden Fluctuations in Temperature and Humidity
The centralized heating in the north can lead to day-night temperature differences of up to 15°C, with air humidity often below 30%. The native environment of azaleas requires humidity to be maintained between 60-75%. In a dry environment, the roots cannot absorb water effectively, so the plant reduces the transpiration area by shedding leaves.
1.2 Impaired Root Function
The low temperature in winter reduces the vitality of capillary roots. When heating is suddenly turned on, the rapid increase in surface temperature damages the shallow roots. At this point, the leaves do not receive enough water supply, triggering a self-protection mechanism.
Two, Azalea Winter Survival Environmental Control Plan
2.1 Temperature Gradient Transition
Gradually move the plant to a buffer zone of 8-15°C (such as a closed balcony) to avoid sudden exposure to heat sources. Use a thermometer to continuously monitor, ensuring that the day-night temperature difference is ≤8°C.
2.2 Scientific Humidity Management
Adopt the "Three-Ring Moisture Method": 1. Inner Ring: Spray the leaves twice a day (10:00/14:00) 2. Middle Ring: Place wet pebble trays around the pot 3. Outer Ring: Use a humidifier indoors to maintain 45% humidity.
2.3 Optimization Strategy for Lighting
In winter, ensure 4 hours of scattered light per day and use a 30% shade rate gauze to filter strong midday sunlight. Rotate the pot 45 degrees every 10 days to ensure even light exposure.
Three, Special Circumstances Response Measures
If a large number of leaves have already fallen, a "Gradual Revival" can be performed: cut off 1/3 of the weak branches and apply a 0.1% gibberellin solution to stimulate the development of new roots. Combined with the bagging moisture retention method, the germination rate of new buds can reach 75% after 2 weeks.
Through systematic environmental control, azaleas can not only survive the winter safely but also experience explosive growth in spring. Remember to avoid sudden cold and heat changes during the maintenance process, as maintaining a stable environment is key.