What to Do When Azaleas Drop Their Leaves? The Latest Solutions Are Here
The characteristics of azaleas are that they like acidic soil, moisture, and warmth; they fear strong fertilizer, intense sun, and both drought and waterlogging. Poor management often leads to abnormal leaf drop. Below, we introduce the causes of azalea leaf drop and the solutions.
What to Do When Azaleas Drop Their Leaves
1. Leaf drop caused by environmental discomfort
Most azaleas sold on the market are grown in greenhouses. After purchase, they cannot immediately adapt to the home's natural environment, and often drop leaves or even die. Azaleas cultivated in a different location will show the same problem.
[Solution] For a newly purchased azalea, try to maintain air humidity, provide appropriate shade, and keep the potting soil moist. It needs air circulation but must not be exposed to direct cold wind. Do not rush to repot or fertilize; let it pass through the adaptation period as safely as possible. In winter, give it plenty of light. When growing it indoors, place it under a south-facing window as much as possible, and the ambient temperature must not be lower than 5 degrees. Do not change its location at will, to avoid sudden temperature changes. Also do not place it in a place with relatively poor air quality.
2. Leaf drop caused by unsuitable potting soil
[Solution] The growing medium must be acidic soil with good aeration and rich in humus, with a pH of 5.5 to 6.5 being most suitable. Normally, apply some alum fertilizer water appropriately, or add a little ferrous sulfate to the water when applying it. If alkaline soil is used, it will cause the leaves to turn yellow and fall off.
3. Leaf drop caused by fertilizer damage
Azaleas do not like heavy fertilizer. In home cultivation of azaleas, the most common mistake is not a lack of fertilizer, but excessive fertilization. Once raw fertilizer or concentrated fertilizer is used, the leaves will scorch and even drop. This is what is called fertilizer damage.
[Solution] When repotting, add an appropriate amount of slow-release fertilizer to the potting soil (the fertilizer is coated with an organic film, and the fertilizer is slowly released through the film to supply nutrients to the plant). It is safe, clean, long-lasting, and results in bright flowers and lush leaves. This fertilizer is often used in horticultural production; it is both convenient and clean, and the azaleas grown with it have lush leaves and bright flowers. In home cultivation, once fertilizer damage is discovered, immediately stop applying fertilizer and water the soil to flush out the fertilizer. After watering, move the plant to a ventilated place for care. Some need to be flushed 2 times, and only after about half a year of care can growth gradually return to normal.
4. Leaf drop caused by waterlogging
The azalea root system is fine and delicate. If the potting soil has poor permeability, or if it is watered too much and too frequently over a long period, and in addition ventilation is poor, the roots will be damaged and rot, causing leaf drop.
5. Leaf drop caused by drought damage
If you are careless and forget to water, or if the water does not penetrate the soil for a long time, leaf drop will also occur. Be sure to remember “when watering, water thoroughly.” Normally, spray water on the leaves and around them to increase environmental humidity.
6. Sunlight and strong wind
Azaleas like light but fear intense sun; they like ventilation but fear strong wind. Placing them under intense sun in summer, or in a drafty spot in spring (especially early spring) and autumn, will cause a large amount of leaf drop.
[Solution] Take care to place azaleas in a spot with morning and evening sunlight and shelter from wind for cultivation.
7. Physiological leaf drop
If flowering is too dense, if nutrients are not supplied in time, or when new leaves sprout, old leaves will also fall off. This is a normal condition and can be solved through normal repotting and supplementary fertilizing. Home-grown azaleas generally bloom and sprout new leaves from April to June, and old leaves will drop. After flowering, carry out one pruning and shaping, cutting off overly dense branches, crossing branches, weak slender branches, drooping branches, leggy branches, and diseased and pest-infested branches. This not only helps ventilation and light penetration and promotes strong branches, but also reduces leaf drop.