Mr. Zhang Dakun sent a letter to ask: My species of cultivated cynica, the flower buds are growing vigorously, and will soon be open one after another. I do not know why there is an abnormal phenomenon in which stem knots burp and flowers fail to open.

A: The phenomenon of wilting stems and half-opening of your ciconia ciconia appears to be due to the following three reasons: First, the roots rot, or if the fertilizer is too much, or because the fertilizer is too much, it is too thick. As a result, the roots of cycads showed rotted roots, which caused them to lose their ability to transport water and nutrients, resulting in wilting of the stem segments and a half-opening of the flowers. The second is that the plant suffered cold damage due to sudden temperature drop, or the temperature difference between day and night was too large. The temperature suddenly dropped drastically overnight, causing the rootstock to stop growing due to cold damage. Sometimes the buds of the plants would fall off, especially the three-stranded arrow as the rootstock. The plants of Crab Gerania grow cease when the temperature drops to 15°C. Once the rootstock ceases to grow, the supply of nutrients to the water is restricted, which inevitably causes changes in buds and stems. If the temperature suddenly drops below 10°C overnight, Falling buds will also occur. Third, the basin soil is too dry, the air is too dry, and the scale insects are seriously endangered. It may also lead to abnormal stem and knot and occurrence of budding.

In order to save your cactus plant, when the pot soil is a little dry, take it out of the pot in the room, shake off part of the soil, check the damage of the root system, if the soil is too wet, the fertilizer is too hot, or The basin soil is too dry and causes severe root damage. The necrotic root system can be cut until the root section is fresh, and the soil is replaced with clean and loose sandy soil. During the rooting period, it should be maintained at no less than 15°C. The room temperature, more water spray less water, and given a certain amount of light and air relative humidity, after the plant has spawned a new root and then replace the more fertile culture soil, and give normal water and fertilizer management.

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