Milan people like to be warm, sunny, and fat. The suitable growth temperature is 20℃～25℃. Under normal circumstances, with sufficient sunshine and high temperature (about 30°C), the flowers that bloom will have a strong fragrance. If it is placed in a shaded place in summer and a large amount of nitrogen fertilizer is applied at the same time, it is one of the main reasons why Milan does not bloom or blooms less and has a weak fragrance. Therefore, during the growth and development period, Milan needs to be maintained outdoors in a sunny place, and attention should be paid to applying more liquid fertilizers containing more phosphorus. It is best to use minced bones, fish bones, chicken bones and other soaked and decomposed fertilizers. Alum fertilizer and water, often supplemented with some chemical fertilizers containing more phosphorus or fermented rice water, etc., can help to produce buds, and they will bloom more, golden in color, and smell fragrant. Milan likes moisture, so water it appropriately during the growth period. If you water too much, it will easily lead to root rot and the leaves will turn yellow and fall off; if you water too much during the flowering period, it will easily cause flowers and buds to drop; if you water too little, it will cause the edges of the leaves to dry up and the buds to wither. Therefore, when the temperature is high in summer, in addition to watering 1 to 2 times a day, you must often spray the branches and leaves with clean water and sprinkle water on the ground where they are placed to increase the air humidity. At the same time, fertilization must also be appropriate. Since Milan blooms more frequently in a year, after each flower blooms, it should be topdressed with 2 to 3 times of fully decomposed thin liquid fertilizer in time, so that it can bloom continuously and have a strong fragrance. Milan likes acidic soil, so potted plants should use culture soil based on leaf mold soil. During the vigorous growth period, spray 0.2 ferrous sulfate solution once a week to ensure green leaves and abundant flowers.