Breeding method:
Milan likes warmth, sunshine and fatness. The optimum growth temperature is 20℃ ~ 25℃. Under normal circumstances, when the sunshine is sufficient and the temperature is high (about 30℃), the flowers will have a strong fragrance. If you put it in the shade in summer and apply a lot of nitrogen fertilizer at the same time, it is one of the main reasons why Milan doesn't bloom or bloom less and its fragrance is weak.
Therefore, during the growth and development of Milan, it is necessary to maintain it in a sunny place outdoors, and pay attention to the appropriate application of liquid fertilizer containing more phosphorus. It is best to use rotten alum water such as broken bones, fish bones, chicken bones, etc., and often add some fertilizers containing more phosphorus or fermented rice washing water, which is helpful for budding, flowering, golden color and fragrant smell.
Milan likes humidity, so water it properly during the growing period. Too much watering can easily lead to rotten roots and yellow leaves falling off; Too much watering during flowering period is easy to cause falling flowers and buds; Too little watering will cause leaves to dry up and buds to wither. Therefore, when the temperature is high in summer, in addition to watering 1 ~ 2 times a day, we should often spray branches and leaves with clear water and sprinkle water on the ground to improve the air humidity.
At the same time, fertilization should be appropriate. Because Milan has a large number of flowers a year, it is necessary to topdressing 2 ~ 3 times of fully decomposed dilute liquid fertilizer in time after each flower, so that the flowers can bloom endlessly and have a strong fragrance. Milan likes acidic soil, and humus-based culture soil should be used for potted plants. In the vigorous growth period, spraying 0.2% ferrous sulfate solution once a week will make the leaves turn green and the flowers multiply.
Cutting, layering with high branches or sowing and propagation. I like warm and plenty of sunshine. Loose, well-drained and breathable soil for potted plants. 65438+ change pots every 0 ~ 2 years, and 65438+ fertilize every 0 ~ 2 weeks. Planting in many gardens in the south; Potted plants in the north should be planted in outdoor places where the sun can shine directly in spring, summer and autumn. In winter, it will be moved to a place with direct sunlight indoors, and the overwintering temperature will be above 10℃.
Milan's propagation method: Milan can receive wild seeds in the natural environment, usually by layering cutting propagation. High pressure method is commonly used in South China. From late April to mid-May, plants with strong growth and no diseases and insect pests were selected, and 2-3-year-old branches were selected on the sunny side, and the cambium was exposed at a position 20 cm away from the bifurcation position. The width of the incision is about 2 cm. After the incision is slightly dry for a day or two, it is wrapped with mud strips and then wrapped with film to keep the mud strips moist all the time and take root in about 50 days. In the second stage, after the new roots are sent out, the mother plants are cut off, followed by mud sticks to slow down the seedlings in the shade, and planted in pots after 1 month.
In recent years, Milan has been cutted and propagated in the northern part of China by using the method of keeping moisture with film buttons. In May, 65,438+0-2-year-old branches were taken as cuttings, which were about 65,438+00 cm long and had 2-3 compound leaves for cutting. Mix peat soil and sandy soil evenly as cutting substrate, and cover the plastic film with sunshade net. The rooting rate can reach about 60% before and after beginning of autumn. However, after transplantation, it slowly grows and takes shape in the north, with twice the result with half the effort.
Some technical points of Milan's breeding in the north;
1, Milan grows more peat, rotten leaves and sandy soil in the north. Families can use (old) Clivia soil and plain sand to cultivate soil. The basin should not be too big, and alkaline fertilizer should not be added to the soil. The bottom of the basin should be padded with drainage layer. After planting, put the seedlings in the shade for maintenance.
2. When drying, spray water on the leaves and the surrounding ground every day to keep the environment moist. After the new leaves grow, they will move to the shade, and then gradually adapt to the strong light, and the flowers will be more fragrant. Potted flower seedlings in spring should be topdressing before and after the arrival of beginning of autumn, especially rare organic liquid fertilizer. From the second year, in the peak season, topdressing organic liquid fertilizer once every 20 days. If it can be applied alternately with the mixed solution of 0. 1% urea and 0.2% potassium dihydrogen phosphate, the flowers and leaves will flourish more. Pot soil should always be moist, and it should not leak because of drought, but it should not be moist for a long time. If it is placed indoors to strengthen ventilation, it will be rotated to the outside in about 15 days.
3. During indoor activities in winter, you need to see enough sunshine, and the lowest indoor temperature shall not be lower than 8℃. Control water and prohibit fertilizer, pay attention to the door and window switches to avoid direct cold air blowing and smoke pollution. Scale insects and the prevention of sooty blotch. In North China, after the dry wind from late April to early May, it will be moved to outdoor maintenance. Milan can change pots every two years. Milan should start pruning and shaping from the seedlings, leaving a section of trunk with a height of 15cm to 20cm. Don't let the main branches grow out of the soil, but prune them at the height of 15cm above the main branches to make the plants plump. The lower branches of perennial plants often age and die. Therefore, it is advisable to cut it every other year in high temperature season, so as to promote the germination of adventitious buds at the lower part of the main branch and grow new lateral branches, so that the tree can maintain a symmetrical posture, the tree is vigorous and the leaves are lush.