The Rhododendron hybridum needs enough sunshine in the growing stage, otherwise it will affect the growth of flower bud and flower opening. In summer and early autumn, when the sun is strong and direct, shade should be given to the plants. Too strong sunlight will wither the leaves of Rhododendron hybridum occidentalis and even cause the plants to die. Attention should be paid to proper watering and spraying water on the leaves to prevent the soil from drying.
The best way to cultivate Rhododendron hybridum is to mix two parts of rotten leaf soil, one part of coarse river sand and one part of sandy loam into nutrient soil. The lowest pH value of soil is 5.5, and the highest is 6.5. Slightly acidic, well aerated soil is good for plant growth, but sticky soil is easy to cause plant rot.
Rhododendron hybridum need to be fertilized every month. Do not use high concentration and raw fertilizer. Regular fertilization can ensure the nutrition demand of the plant at the bud stage, and the flower will bloom more colorful. If the fertilizer is not enough, the flowers will bloom in a small number, and even some plants will have long bracts, but in the process of growth, they will gradually become leaves and branches and buds, so that we flower friends are happy for nothing.
The potted Rhododendron hybridum needs to be placed in a well ventilated place and well cared for. The flowering period can last for one month. From July to August every year, the flower buds of Rhododendron hybridum occidentalis begin to appear. In the early autumn, move the plants into the room and keep the room temperature at 20 ℃. After half a month, they can bloom. After flowering, it is necessary to go out the residual flowers, trim the branches and maintain them. Temperature is related to the flowering of Rhododendron hybridum occidentalis. If the temperature control is reasonable, the flowering of plants can be achieved on New Year's day and Spring Festival. If the outdoor temperature is not lower than - 5 or - 6 degrees, there will be no problem with the plants outside.
In autumn, it's easy to have dry and hot weather, followed by diseases and insect pests of Rhododendron hybridum occidentalis. The leaves start to turn yellow and grow white. If it's serious, all the leaves will fall off and the plants will die.
If this situation begins to appear, we must first cut off the diseased leaves and destroy them, and spray carbendazim for sterilization. Spray it every 7 to 10 days, and pay attention to the air circulation.
