What is the cause of the cuckoo's death?

Cuckoo deaths are generally caused by the following reasons.

The soil alkaline clayey rhododendron must have a PH value of 5.5 to 6.5. it is suitable to use the culture soil with strong water permeability and rich humus. The culture soil should be used only after insecticidal sterilization or high temperature disinfection. Clay permeability is poor, alkaline soil will cause small flowers, stems and leaves, branches and shoots dry up, and even death.

Poor ventilation azaleas like cool, fresh air, poor ventilation is easy to form a high temperature, dry and hot environment, and prone to brown spot, red spiders and other diseases and insect pests. The ventilation condition should be improved, branches and leaves should be sprayed with clean water to increase humidity and reduce watering water at the same time.

Long-term lack of light rhododendron flowers colorful, longer florescence, put indoors, a large amount of nutrients consumption in the plant, and photosynthesis is affected, nutrients can not be replenished in time, plants will wither and die for unknown reasons. Shade is needed in summer to avoid strong light burning leaves, but in spring, early summer and winter, you should receive light in the morning to avoid being exposed to weak light for a long time.

Improper use of water and fertilizer due to the cuckoo root slender, so afraid of dry and waterlogging. Watering too much will cause fallen leaves, buds, if often in the state of too much water, it is easy to cause rotten roots to die. Should be moderately watered, the soil can be dry and wet, keep the air humidity above 70%, strictly control the water in winter, and keep the soil micro-tide. Cuckoos do not tolerate large fertilizers, especially avoid thick fertilizers and raw fertilizers, such as rotten eggs, dead livestock and poultry, or chemical fertilizers with excessive concentration, which are easy to burn roots and cause plants to wither and die. A small amount of fertilizer should be paid attention to when fertilizing. if a large amount of fertilizer is needed, the number of fertilization can be increased, and at the same time, a small amount of ferrous sulfate should be added. Stop fertilizing in October to avoid sprouting new branches and affecting the safety of overwintering.

If the basin is not changed enough in time, if the basin is not changed all the year round, the plant will be large and small, the root system will be too much and too long, the knot will be too dense, it will not be able to stretch in the basin, the nutrients will be exhausted, and it will die after a long time. Therefore, change the pot at least every 3 years, remove the plant from the old basin, peel off part of the persistent soil, spread the fibrous root, cut off the overlong fibrous root, diseased root and withered root, replace it with new culture soil, and promote the metabolism of root system.