To cultivate azaleas, we must first choose suitable culture soil. Loose, smooth drainage, good ventilation, rich acid soil and humus, and sufficient base fertilizer are the basic conditions for the propagation of rhododendron. Rhododendron will grow vigorously in acidic soil, but it will wither quickly in alkaline soil. Rotten soil generally belongs to acidic soil, among which pine humus soil is the best, which is an ideal culture soil for planting rhododendrons. Take soil under the pine and cypress forests in mountainous areas, or take soil under the ground where many pine and cypress trees are planted in the courtyard. Add some sulfur powder and alum before use to improve soil acidity. The soil with high humus content is most suitable for breeding azaleas. Rich humus can replenish nutrients in the soil in time, improve the soil structure, make the soil retain water, fertilizer, ventilation, absorb heat and keep warm, reduce the harm of toxic substances in the soil, and promote the root expansion of rhododendron.

Watering azaleas is also a very important job. Rhododendron root system is weak, too dry or too wet is not conducive to plant growth, so special attention should be paid to controlling water quantity when breeding Rhododendron. Lack of water during leaf development will make the leaves of rhododendron yellow and the branches and leaves curl. If you do it badly, you will die. Lack of water during flowering will make petals soft and shrivel, flowers droop, colors are not bright, and even flowers wither. Therefore, watering azaleas must be done according to the weather, air humidity and soil water content. Water in the morning and evening, not at noon, especially in hot summer. Pay attention to whether to do it or not when watering, but be sure to water it thoroughly, not half. It is best to use natural rainwater, river water and pond water without impurities such as drugs and bleaching powder, and tap water is not suitable for long-term use. Acidified water is the best water quality. The usual method is to sprinkle a small amount of ferrous sulfate on the soil surface every two weeks or add 1% vinegar to the water once to keep the soil acidic.