Ten Key Points on Azalea Cultivation Techniques

1. Prefers shade and fears direct sun; strong direct light easily scorches it, but too much shade will also cause poor growth and make it hard for flower buds to form.

2. Prefers acidic soil, with a pH of around 6 being most suitable; in overly alkaline soil, the leaves will gradually turn yellow and wither from the bottom up, and the plant may even die.

3. A physiological iron deficiency affects chlorophyll synthesis, causing leaves to become smaller and yellow-white.

4. It can generally tolerate low temperatures below 10°C, but because the azalea's roots are shallow and fine, close to the surface soil, it cannot tolerate intense heat.

5. Because the root system is fine, its ability to absorb and supply water is poor, and it fears both drought and waterlogging; it can only grow well when the air humidity is 70% to 90%.

6. Watering must be just right: if the surface is wet but the bottom is dry, the roots will be damaged and old leaves will drop early; if water accumulates and rots the roots, new leaves will turn white-yellow; if water is lacking during the flowering period, the petals will droop; if water is lacking during the leaf-unfolding period, the central leaves will curl and the leaf color will turn yellow.

7. With insufficient nitrogen fertilizer, the leaves are thin and lusterless, the branches are short and spindly, and the flowers are few and small; with a phosphorus deficiency, some leaves turn red-purple and easily drop; with a potassium deficiency, old leaves turn gray-green, the leaf margins turn yellow-green, spots appear on the leaves, and they eventually turn brown, even scorching and dropping.

8. If the fertilizer is too concentrated or too abundant, it causes reverse osmosis, the fibrous roots shrivel from water loss, and the leaf tips and leaf margins all lose their luster, gradually scorching and dropping.

9. Poor ventilation and stagnant air cause leaf drop.

10. It fears snow attacks and frost; for overwintering, around 8°C is suitable; if the room temperature is too high, it cannot go dormant, its physiological activity does not decline, and it continues to consume large amounts of nutrients, which is unfavorable for growth and development the following year.