What are the 10 reasons for yellowing leaves?

1. Improper watering:The money tree (Pachira aquatica) likes a warm and humid climate environment, and the potting soil is best kept moist, but when grown indoors, generally do not water until the potting soil is dry, and when you do water, water thoroughly. Because if you do not water thoroughly and the top is wet while the bottom is dry, it will affect nutrient uptake, causing the leaves to become dull and lusterless, and gradually wither and yellow from the bottom up and drop off. In this case, you need to water a small amount and spray water frequently, so that it gradually recovers and then returns to normal watering.

2. Unsuitable lighting:The money tree likes light, but it is not tolerant of strong direct light; semi-shade or diffused light is best, and only in winter does it need good light conditions to grow well. Starting in late April, you can choose a sunny, warm noon to move the pot outside or onto a balcony for 1-2 hours of direct sunlight, and gradually extend the time; this will give very good growing results. If it is kept in shade or a dimly lit place for a long time, the leaves will turn yellow and drop, and in severe cases the plant may even die.

3. Pest and disease control:Leaf spot disease is a common problem of the money tree. The symptoms are that a few spots appear first, and then the spots gradually expand and spread over the entire leaf, and the leaf drops off. Garlic juice can be sprayed to sterilize. As for pests, the main ones are red spider mites and scale insects. Red spider mites are small, with a body length of less than 1 mm, and can be effectively controlled with mite-killing agents such as maimaijing, keteman, and dicofol. Scale insects vary in size depending on the species, and their colors also differ greatly, but they share one common feature: they are round or oval, generally do not move, and cling tightly to the stems or leaf stalks of the plant to suck sap. When there are few, they can be wiped clean with a cloth strip, because scale insects die as soon as they leave the plant; when there are many, you can spray a 0.2% solution of essential balm or laundry detergent for control.

4. Too much fertilizer:Generally, during the period of suitable growth temperature for the money tree, fertilizer should be applied regularly to ensure vigorous growth of the plant. Usually, a light fertilizer is applied once about every 20 days, and decomposed base fertilizer should be added when repotting. However, if too much fertilizer is applied, or if the fertilizer applied is not decomposed, it will cause root burn in the money tree, resulting in yellowing and dropping of leaves.

5. Dust on the leaf surface:If the dust on the leaf surface is too thick, it not only affects the appearance, but also affects the plant's respiration and photosynthesis, thus causing the leaves to turn yellow. The dust should be wiped off promptly.

6. Incorrect soil-changing operation:When changing the soil, incorrect operation can also cause the leaves of the money tree to turn yellow. When changing the soil for the money tree, try to damage the roots as little as possible. The added should be sterile, breathable, fertile, and slightly acidic. The potting soil should also be packed firmly, with no gaps left. If there are gaps, no matter how much water is poured, the plant will still suffer from water shortage, thus causing the leaves to turn yellow.

7. Low environmental temperature:The money tree likes a warm and humid environment. Its optimum growth temperature is 20-30°C. When the temperature is below 18°C, the money tree stops growing. It can adapt to temperatures as low as 10°C, but the temperature must not fall below 5°C, otherwise freezing damage will occur: in mild cases the leaves turn yellow and fall off, and in severe cases the plant dies.

8. Hot high temperatures:For the money tree, which likes a warm and humid environment, if it is placed under high temperatures and exposed to the sun, the plant's transpiration will be excessive, and the roots will not be able to supply enough water and nutrients, which can easily cause scorched leaf tips or yellowing and dropping of leaves. It needs to be moved promptly to a well-ventilated, cool place.

9. Too dense and poorly ventilated:If the branches and leaves of the money tree grow too luxuriantly and have not been pruned for a long time, the inner branches and leaves will not get enough light, which can easily cause the leaves to turn yellow and drop. Pruning should be strengthened promptly to allow ventilation and light penetration.

10. Soil and water tending to be alkaline:In most areas of the north, the soil and water contain more salt and alkali, and are not very suitable for planting the acid-loving money tree. Because the soil lacks iron elements that it can absorb, the leaves of the money tree will gradually turn yellow. Therefore, when planting, pay attention to choosing acidic soil, and frequently water with alum fertilizer water during the growth period.