1, soil selection: Camellia usually likes high temperature and high humidity environment, and is not too picky about soil quality, but it is best to choose fertile and humid acid soil (PH 5-6.5) with good drainage, which is not dry in summer and close to alkaline soil.
2, temperature requirements: Camellia likes warm and humid climate, more resistant to shade, to 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 growth temperature is 20-25℃, and sunburn will occur when it exceeds 35℃. The initial flowering temperature is 2℃, and the suitable flowering temperature is 10-20℃. Shade and cool in summer and autumn. ?
3. Lighting requirements: Camellia grows well in the 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 bright light in the midsummer afternoon.
4. Fertilization method: Camellia likes fertile, loose and slightly acidic loam or humus, which can grow in the range of pH 4.5-6.5. Need good drainage, no water accumulation, to avoid root rot.
However, the air humidity is required to be high and cannot be dried. Land with annual precipitation above 1200mm can grow well as long as it is drained in time after heavy rain. Therefore, Camellia oleifera seedlings and cultivation should be watered frequently to keep the soil and air moist. It is required to apply fertilizer frequently and with low concentration, and it is forbidden to apply high concentration and large dose fertilizer at one time.
5, watering method: don't get particularly dry in summer, water every day, in order to make the flowerpot not dry, irrigation is better.
Take potted plants as an example. Camellia does not bloom or even drop buds when budding, which is caused by insufficient water. Therefore, when it bears flowers, it should be sprayed frequently to improve the humidity and prevent falling flowers.
Matters needing attention in camellia cultivation:
1, be careful not to expose camellia to the sun;
Camellia is a semi-cloudy and semi-sunny environment, warm and humid. The optimum temperature for the growth of camellia is 15-25℃, which 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 summer is hot, spray water mist on branches and leaves and around them to cool down and prevent dryness. Shading treatment is needed 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 budding period from April to September, so as to avoid the leaves on the shady side suddenly contacting with strong light and withering. ?
3. Be careful not to plant camellia in alkaline soil:
Camellia root meat is fragile, so we should choose 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 pot soil once every two or three years. Pay attention to the bottom fertilizer when changing pots, 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 not to apply too much fertilizer:
Camellia is a fleshy root, and it is easy to rot when poured with too much water, so it must be moderate. When the weather is dry and hot, water the leaves twice a day. Camellia likes fertilizer. Except in flowering period, it can be applied sparingly and frequently, but it is forbidden to apply too much fertilizer, otherwise it will easily damage roots and burn plants.
Phosphorus and potassium fertilizer is the main fertilizer, followed by nitrogen fertilizer, and it is better to mix three parts of decomposed cake fertilizer, chicken manure or human manure with seven parts of water. Apply it once every 20 days in summer and autumn to promote the vigorous growth and strong plants of camellia.