Hydrangea likes fertilizer, and during its growth period, it is generally applied with decomposed thin cake fertilizer every 15 days. In order to keep the acidity of the soil, 1%-3% ferrous sulfate can be added to the fertilizer solution for application. Regular irrigation of alum fertilizer can make plants grow green; Adding potassium dihydrogen phosphate 1-2 times at the bud stage can make the flowers big and colorful; The application of cake fertilizer should avoid the dog days, so as not to cause diseases and insect pests and damage the root system.
Hydrangea has large leaves, luxuriant branches and leaves, and needs more water. In the spring, summer and autumn of the growing season, it is necessary to pour enough water to keep the basin soil moist. In summer, the weather is hot and the evaporation is large. In addition to watering enough water, water should be sprayed on the leaves every day. The root of hydrangea is a fleshy root, so you can't water it too much, and avoid water in the basin, otherwise it will rot the root. After September, the weather is getting colder, so we should gradually reduce the amount of watering. Before first frost moves indoors, the room temperature should be kept at about 4 degrees. Remove the leaves before entering the room to avoid rotten leaves. The plants should be placed indoors in the sunny place in winter, and it is advisable to leave the room after Grain Rain in the second year. Hydrangea is an ideal potted flower with extensive management and few pests and diseases, which is relatively easy to manage and cultivate.