1, soil selection: Camellia usually likes high temperature and humidity environment, and does not pay much attention to soil quality, but it is best to use fertile and moist acid soil with good drainage (PH 5-6.5), which is not dry and close to alkaline soil in summer.
2, temperature requirements: Camellia likes warm and humid climate, more resistant to shade, avoid exposure. Cold resistance varies from variety to variety. Varieties close to the original species can tolerate the low temperature of-10℃, while rare varieties have poor cold resistance.
The optimum temperature for growth is 20-25℃, and sunburn will occur when it exceeds 35℃. The initial flowering temperature is 2℃, and the suitable flowering temperature is between 10-20℃. Summer and autumn should be shaded to cool down. ?
3. Lighting requirements: Camellia grows well in semi-shade, but in order to make the color more gorgeous, it is best to plant it in a place with sufficient light. When the seedlings are still tender, we should especially avoid the strong light in the midsummer afternoon.
4. Fertilization method: Camellia likes fertile, loose and slightly acidic loam or humus soil, which can grow within the pH value of 4.5-6.5. It requires good drainage and no water accumulation to avoid root rot.
However, it is required that the air humidity is high and dry is avoided. The land with annual precipitation above 1200mm can grow well as long as it is drained in time after heavy rain. Therefore, camellia seedlings and cultivation should be watered frequently to keep the soil and air moist. It is required to supplement fertilizer frequently and with low concentration, and it is forbidden to apply fertilizer with high concentration and large dose at one time.
5, watering method: do not make it particularly dry in summer, water it every day, in order to make the flowerpot not dry, irrigation is better.
In the case of potted plants, camellia does not bloom or even drop buds when it bears buds, which is caused by insufficient water. Therefore, it should be sprayed frequently when it bears flowers to improve humidity to prevent falling flowers.
Matters needing attention in camellia cultivation:
1, be careful not to expose camellia in the hot sun;
Camellia is a semi-cloudy and semi-sunny environment, and it is warm and humid. The optimum temperature for camellia growth is 15-25℃, so it is suitable for planting in places with semi-shade or astigmatism in summer, full light in the south and wind barriers in the north in winter.
When it is hot in summer, spray water mist on the branches and leaves and around them to cool down and prevent dryness. Shading treatment is required from June to September.
2. Be careful not to change the placement direction of camellia at will:
Camellia has poor adaptability, so it is not allowed to change the placement direction of Camellia at will during the budding and long bud period from April to September, so as to avoid the sudden contact of the leaves on the shady side with strong light and withering. ?
3. Be careful not to cultivate camellia in alkaline soil:
Camellia root meat is fragile, so we should use slightly acidic soil with loose soil and good drainage. Cohesive and alkaline soils are not suitable, especially calcareous soils.
Moreover, it is best to change the basin soil once every two or three years. When changing the basin, pay attention to the base fertilizer at the bottom of the basin, and use a small amount of substances containing calcium superphosphate such as hair, bone meal, chicken feathers and poultry. It is better to change pots between "Rain" and "long summer".
4. Be careful not to water camellia too much and apply too much fertilizer:
Camellia is a fleshy root, and it is easy to rot if poured too much water, so it must be appropriate. When it is dry and hot, water the leaves twice a day. Camellia likes fertilizer, except at flowering stage, it can be applied thinly and frequently, but it is forbidden to apply too much fertilizer, otherwise the roots will be easily damaged and the plants will be burned to death.
Phosphorus and potassium fertilizer is the main fertilizer, followed by nitrogen fertilizer, and it is better to use three-part decomposed cake fertilizer, chicken manure or human manure mixed with seven parts of water. Apply it once every 20 days in summer and autumn, so as to promote the vigorous growth and robust plants of camellia.