Solution pests and diseases If the leaves of the umbrella you cultivate turn black first and then rot, it may be caused by bacteria. At this time, I suggest you spray some fungicides such as carbendazim on the leaves; If you find that there are obvious bugs on their leaves, you can choose to spray "black whirlwind", and the bugs will be fine after a while.
Improper fertilization If the big umbrella is not fertilized properly, the phenomenon of "burning leaves" will appear, which is also the main reason for the discoloration of the big umbrella leaves. If a small amount of fertilizer is applied at a time, but black leaves still appear, it may be that the fertilizer is too close to the umbrella root when fertilizing.
Umbrella with improper growth environment is a plant that likes sunshine, so umbrella plants should get enough light. However, the umbrella with big leaves is not resistant to high temperature, so we should pay attention to it in high temperature roasting weather such as midsummer. Because umbrellas are generally cultivated as indoor foliage plants, some friends may ignore the need for light, and if the growing environment is too dark, the umbrella leaves will fall off.
Precautions Indoor ventilation conditions are as important as drainage of the selected cultivated soil. Keep the environment around the umbrella relatively dry, and water it when the basin soil is 80% (at least the surface) dry.