Rhododendron occidentalis has a shallow root system, so it is forbidden to plant small seedlings in large pots. Rhododendron occidentalis, which is usually 1 ~ 2 years old, is planted in a pot with a diameter of 10 cm. three
4-year-old plants are planted in pots with a diameter of 12 cm; 5-7-year-old plants are planted in pots with a diameter of 15 cm; 8 ~ 10 years old.
Potted plants with a diameter of about 20 cm; 1 1 ~ 15 years old is planted in a pot with a diameter of about 25 cm; Diameter of those born over 06 years old 1 cm.
Potted plants 100 meters. It is best to change the pot in the middle and late August. When changing pots, put more bricks or pebbles on the bottom of pots for easy use.
Drainage and ventilation. When planting, the root system should be stretched, and the basin soil should be soaked after compaction to avoid the impact of water flow on the basin soil. Every 1 thereafter.
Loosen the soil at noon on a sunny day last month 1 time to keep the permeability of the basin soil good.
2. Water and fertilizer management waterlogging is the main reason for the defoliation of Rhododendron occidentalis. However, the dry environment can easily lead to leaf failure, petal scorching, bud closing and leaf withering. Watering azaleas in the west should be done in a harmonious way. Fu Wei and his colleagues raised the bonus for the second time. Water every 3-4 days from 10 to 3 pm in winter morning 1 time; Water every morning in spring 10/time; Water as little as possible in rainy season, and pour out the accumulated water in the basin in time when it rains heavily. Avoid spraying water on the blooming leaves, otherwise it will cause water damage and flower decay. It is forbidden to apply raw fertilizer, concentrated fertilizer and large fertilizer, especially human manure and concentrated fertilizer solution. It is best to apply fat water to cooked cakes and add a small amount of ferrous sulfate to prevent physiological yellowing of leaves. The ratio of water to fertilizer is 7∶3. In rainy season and midsummer season, change pots and stop fertilizing. During flowering, loosen the soil to remove impurities in the basin, and pay attention to fertilization 1 time per week and * * * fertilization for 3 ~ 4 times; At the same time, pay attention to ventilation to avoid spraying water on the blades. Third, warm light management azaleas in the west like shade and are afraid of sun exposure. If they plant flowers on the balcony, they can put them in the balcony fence, or put them in places where they can only bask in the sun in the morning and not in the afternoon; Move the flowerpot indoors in winter to avoid freezing the roots and dying. At 0 ~ 4℃, 4. Proper pruning and shaping should be done to promote the emergence of strong new branches. After the bud is formed and before flowering, it must be thinned twice: 1 in the middle and late period of 1 1, leaving only 1 bud on each tip and removing the rest; The second time, in the first half of April, the 1 ~ 2 buds differentiated by the branches were removed together with the leaf buds germinated on the buds. Pick the residual flowers in time. High temperature makes rhododendron go into dormancy. V. Prevention and control of pests and diseases In order to prevent and control pests and diseases, 800 times of thiophanate methyl solution or equivalent Bordeaux solution is sprayed 2-3 times before the new buds germinate in winter and spring. In the rainy season, the basin soil is too wet, which is prone to black spot disease. 50% carbendazim wettable powder can be sprayed 600 times per week 1 time, 3 times in a row. Red spider is easy to occur in midsummer, and it can be removed manually or sprayed with 50% dichlorvos emulsion 2 000 times.