Cultivation know-how: Suitable varieties of potted rhododendron are Sihaibo, Chinese Peony, Crown, Wubaozhu and Xue Tao (also known as Holland). It is advisable to use clay pots for strong seedlings propagated by cutting or high pressure. Select humus soil under coniferous trees as basin soil, add a small amount of garden soil and sand, and then add bone powder, or mix humus soil under broad-leaved trees 4 parts, decomposed manure 4 parts and sand 2 parts evenly, add appropriate amount of sulfur powder to make the soil acidic, and apply human base fertilizer. The size of the flowerpot should be adapted to the size of the plant. The pot is too big, the soil is too wet and rotten, and the bottom of the pot is paved with tiles to facilitate drainage. When putting the seedlings into the pot, they should be compacted around them. After that, water the seedlings with a soaking basin. The soil in the basin is often kept moist during its growth. It is best to store tap water in the cylinder for 1~2 days and place it in a ventilated and cool place. 10~ 12 days later, the balcony is ventilated in the semi-shade.
A warm room with weak light and good air circulation in winter. Watering during the growing period is very important, depending on the dryness and wetness of the basin soil. If you water it properly, you should water it thoroughly, not half. If you water it too much, you will lose leaves and even die. In spring, the flower buds germinate, and there is a little more water to ensure sufficient water. When the flower buds develop color, water them at least 1 time every day to avoid dehydration; Water should be poured 1 time in the morning and evening in summer, and the amount of water should not be too much. Every day around noon, spray water on the leaves and the ground to increase the air humidity, reduce the evaporation of water from the leaves, and pay attention to shading; After autumn, the amount of watering is reduced. Water it every morning 1 time to keep it moist. Don't be too dry or too wet to avoid falling leaves. Winter (65438+February ~ February) is not suitable for wintering indoors. Every 3~4 days, according to the dryness of the basin soil, it should be done in the sun from 10 morning to 3 pm, and properly watered to keep the basin soil moist. It is best to master thin fertilizer and apply it frequently during the growth period. It is best to dilute the decomposed cake with fertilizer and water, and avoid applying thick fertilizer. Fertilize more before and after flowering in early spring, and topdressing 1 time every 7~ 10 days to make it grow more branches and leaves and create conditions for bud pregnancy. Topdressing phosphorus-rich liquid fertilizer (bone meal, potassium dihydrogen phosphate, etc.). ) Promote flower bud differentiation from June to July. Stop fertilizing after entering the midsummer.
Phosphorus and potassium fertilizer should be applied frequently in autumn (weekly 1 time), and fresh water should be poured 1 time the next day after fertilization. Stop fertilizing in winter and rainy season. For 1-2-year-old seedlings, little or no chemical fertilizer should be applied, otherwise it will easily cause "fertilizer damage"; Prune at the right time. After autumn, there are usually 1~4 buds at the top of the plant. Before flowering, pruning must be carried out, leaving only one 1 bud and thinning the rest.
After spring, the buds are peeled off. If there are 2~4 flowers in the bud, only 1~2 is left, and the nutrition is concentrated to make the flowers huge and beautiful. In addition, after growing up, the diseased branches and weak branches are mainly cut off, and thinning is the main method. If the basin soil is not alkalized, there is no need to turn over the basin every year.