Why does Milan die easily after the leaves wither in late winter and early spring? How to manage?

Milan likes moist, fertile and loose loam or sandy loam, and slightly acidic loam is better. Potted soil can be mixed with 25% compost, 50% humus and 25% river sand. Put a proper amount of decomposed cake fertilizer at the bottom of the basin as the base fertilizer. Milan likes warm weather. When the temperature was 16℃, the new branches began to grow, and when the temperature was 25℃, the plants grew vigorously.

When Milan first went to the basin, it was necessary to water it for half a month less to promote new roots. In summer, the temperature is high, the evaporation is large, and the watering amount is slightly larger; During the flowering period, the watering amount should be reduced appropriately to avoid falling buds. After autumn, the weather turns cold and grows slowly, so we should control the amount of watering. The principle of watering is to water it when it is dry, or not to water it when it is dry. In hot summer, water can be sprayed around the leaves or flowerpots before sunset to increase the humidity of the environment. Although Milan likes sunshine, it should be shaded at noon in midsummer to avoid burning leaves in the hot sun. Milan likes fat. During the vigorous growth period in summer, Qin Ying used alum fertilizer made of broken bones, fish intestines and hoofs to fertilize. Appropriate application of liquid fertilizer containing more phosphorus can make Milando blossom with rich fragrance and golden color.

Potted Milan usually needs to turn over the pots and change the soil 1 time every two years. Don't break the soil, remove some old soil without roots and cut off rotten roots. When adding new soil, add some phosphate fertilizer as base fertilizer, not too much. Marinate the pot in the shade, and move it to the sunny place after about one week. Generally, it is more appropriate to change the soil for about a week after going out in spring.

Milan is afraid of the cold, and it is very sad for winter. When the temperature is lower than 12℃, fertilization should be stopped and watering should be reduced. Before the first frost, it should be moved to the sunny place indoors, and the temperature should be kept at about lO- 12℃. In order to protect the leaves, properly spray the branches and leaves with warm water. If the temperature is low, you can also cover it with plastic bags for a while, but leave holes in it to breathe.

The next spring, you can't go out until the temperature is stable, so as not to freeze the plants in spring. Before leaving the house, plants should have an exercise process to adapt to temperature changes. For example, move out to bask in the sun at noon and move back at night; When placing potted plants indoors, gradually open the window, etc.

[Pest control] Under the conditions of high temperature and poor ventilation, Milan is prone to aphids, red spiders, scale insects and moldy tobacco diseases. It can be treated with 1500 times dichlorvos or dimethoate. Control of scale insects and red spiders with 0.3 degree stone sulfur mixture. Mild mildewed tobacco diseases can be smeared by hand, and 1500 times of thiophanate can be sprayed in severe cases.