Camellia usually needs to be watered with neutral or acidic surface water. When watering, it should be dry and wet. Water it thoroughly when it is dry, but be careful not to be too dry. Generally, water should be stopped at the end of spring shoots before germination to facilitate the transformation to reproductive growth, and water should not be stopped before flowering. But it should be noted that if you grow up in a general living room, you will die easily. Ordinary fertilization can be -30cm pot) 10g/ pot; Compound fertilizer 2g/ pot; You can also use 0. 1% urea and 0. 1% potassium dihydrogen phosphate once every 10-20 days, and the above fertilizers are used alternately. If the new shoots are yellow due to iron deficiency, 0.2% ferrous sulfate can be applied once a week until they recover. Apply 0.2% ferrous sulfate every 15-30 days to prevent yellowing and root rot in the north. 1. It is best to plant in the north of the Yangtze River in spring and in the south of the Yangtze River in autumn. Ground planting should be selected with good drainage and strong water retention performance. Sandy loam rich in humus. Pot culture is made of humus soil, sandy soil and manure with 65,438+0/3 each, or mixed culture soil with 4 humus soil, 5 peat soil and 65,438+0 coarse sand. The pH value is 5-6.5. The planting place should be where there is no water and no sun exposure. Potted camellias should be placed in a ventilated and light-transmitting place in winter and in a shade shed or other cool places in summer. Camellia should avoid moving its position randomly, otherwise it will be bad for its growth. 2. Camellia guangwenensis is a long-day plant. Flower buds can only be formed in the environment of day length 12 hours. The optimum growth temperature is 18- 25℃, and the optimum flowering temperature is 10-20℃. Above 35℃, the leaves will be burnt. It is not cold-tolerant. It should be indoors in winter, and the temperature should be kept at 3 ~ 5℃. It can tolerate the low temperature of-10℃ for a short time, but it cannot exceed 16℃ for a long time, otherwise it will promote germination and cause defoliation. The growing season should be placed in a semi-shady environment, and it is not suitable to accept too strong direct sunlight. Especially in summer and autumn, it should be shaded or placed in a cool place under a tree. 3. Water fertilization Camellia requires high fertilizer and water, and neutral and alkaline loam is not conducive to its growth. In the north, it is particularly important to pay attention to acidifying alkaline water before watering flowers. The specific method is to store the rice washing water for 2 days to volatilize the chlorine in the water, and then add an appropriate amount of ferrous sulfate (about 0.5% of the water). Don't water too much, or the roots will rot easily. Pot soil can't be dry, otherwise the roots will shrink due to water loss, so it is advisable to keep the pot soil and surrounding environment moist. Don't spray water during flowering. It is best to apply thin alum fertilizer and water to avoid applying thick fertilizer. Generally, after germination in spring, dilute fertilizer water is applied 65,438+0 times every 65,438+07 days, phosphorus and potassium fertilizer are applied in summer, and fertilizer can be stopped for about 65,438+0 months in early autumn, then alum fertilizer water is applied before flowering, and quick-acting phosphorus and potassium fertilizer is applied when flowering, so that the flowers are bright in color and have a long flowering period. 4. Prune the camellia planted on the ground, mainly by cutting dry dead branches, weak branches, cross branches and over-dense branches, which obviously affects the branches of the tree and sparse redundant buds. Besides the above work, potted camellia should be pruned according to personal preference, but it is not suitable for re-pruning because of its weak growth potential. 5. Flowering control Because camellia is not cold-tolerant, delayed flowering is not commonly used. Generally, the flowering period is controlled by variety selection, temperature control and hormone treatment. In order to make camellia blossom in 1 1 month, we can dip 0. 1% gibberellin in the bud with a brush in mid-July or early August, and apply it 1 time every three days to achieve normal fertilizer and water management. It depends on the growth of flower buds in September to decide whether to draw flowers. If it is estimated that "Eleventh" flowering is unsafe, we can increase the number of flower coating, increase the amount of fertilizer and water, promote the rapid growth of flower buds, and make "Eleventh" blossom.