In general, the basin needs to be changed once in October. When changing pots, the aged rhizomes and dead leaves should be removed and planted with 2 parts of rotten leaf soil, 1 part of peat and 1 part of sand. After watering, put it in the shade for a few days, and move it into the greenhouse or indoor.
Water flowers and leaves scientifically, Rohdea japonica likes high humidity environment, and the basin soil for overwintering in winter should be dry and wet, not too dry. If the basin soil is too dry, the leaf tip will turn yellow and scorch, wither and even the whole plant will wither. The main reason is that the root system can not absorb water. Therefore, keep the air moist and basin soil moist in winter. Generally, it is better to water once a week, and clean the leaves with warm water once to keep the leaves bright.
The flowers and leaves of Rohdea japonica love high temperature and fear cold. They will move into the room in October for winter. Keep the temperature around 15 ℃. Sufficient light and good ventilation are required. When the temperature is lower than 10 ℃ or too wet, the leaves will fall, even the top of the stem will rot; when the light is too weak, the leaves will fade. Usually use soft cloth to scrub the leaves, remove dust and increase the ornamental.
In the growth period of Rohdea japonica flowers and leaves, fertilization is usually done once a month, especially the application of nitrogen fertilizer, which can promote the rapid growth of Rohdea japonica flowers and leaves.
In winter, we should also do a good job in pest control. The main diseases are leaf spot and anthrax. In addition to ventilation and transparence and the pot soil should not be too wet, 0.5-1% Bordeaux solution or 70% tobuzin 1500 times solution can be used for spraying control.
The main pest is brown soft scale, which can be controlled by scraping or spraying with 40% Omethoate emulsion 1000 times.
