Indoor plants, Changchun winter temperature is low, pay attention to heat preservation. I recommend some indoor functional plants to you: 1. Cultivation techniques of radish: the pot soil should be loose, fertile and rich in organic matter; Green radish is required to grow in an environment with high temperature and strong scattered light; While moderately watering the basin soil to keep it dry, water is often sprayed on the leaves and back. In summer and autumn, spray water on the leaves every morning, noon and evening to increase humidity; Apply dilute liquid fertilizer every 10 ~ 1 day/time, and the plants are multi-branched and should be pruned properly. Cultivation value: In addition to high ornamental value, green radish can effectively adsorb and remove pollutants such as formaldehyde, benzene and trichloroethylene in indoor air, and it is a natural "air purifier". 2. Peacock arrowroot cultivation techniques: Peacock arrowroot potted plants should use loose, fertile, well-drained, slightly acidic loam rich in humus, and sufficient water should be given during the growth period, especially in summer and autumn. Besides keeping the potted soil moist, the leaves should be often sprayed with water to cool and moisturize. Avoid dry air and dry soil, but don't accumulate water. After the end of autumn, water should be controlled to survive the winter with cold resistance. Breeding value: it can remove ammonia pollution in the air (0.86mg of formaldehyde and 2. 19mg of ammonia can be removed within 10 square meter). 3. Ivy cultivation techniques: Ivy cultivation management is simple and extensive, but it needs to be planted in a place with moist and ventilated soil; Potted plants can be tied with various supports, dragged and shaped, maintained under shade shed in summer and put into greenhouse for wintering in winter. Indoor air humidity should be kept, not too dry, but the basin soil should not be too wet. Cultivation value: it can purify indoor air, absorb harmful gases such as benzene and formaldehyde, and effectively resist carcinogens in nicotine. 4. Cultivation techniques of Radix Puerariae: The soil in the basin should always be moist, and it is best to drip slowly from the top of the column; Avoid drought in summer, have enough water, and often spray water on the leaves; Flood control in winter, basin soil should not be wet for a long time; Usually, the placement direction is constantly changed, so that the green leaves are evenly illuminated and the plant posture is balanced and full. Cultivation value: It can purify the air and remove formaldehyde, benzene, carbon monoxide and nicotine. 5. Cultivation techniques of cactus: it needs plenty of sunshine, but it can't be exposed to strong light in summer; The watering time should be in the early morning of summer, before noon on sunny days in winter and in spring and autumn. In general, do not spray water from the top; Summer is the growth period of cactus, the temperature is high and the water demand is large, so it must be watered fully; During the winter dormancy period, it is necessary to control watering and keep the basin soil not too dry. Cultivation value: radiation resistance, air purification, edible and medicinal.