What to do if the orange tree leaves turn yellow

1. Reasonable watering

The yellowing of orange tree leaves may be caused by excessive water loss due to hot weather. At this time, the amount of watering should be appropriately increased. You can water once in the morning and once in the evening, and be careful not to water too much at one time. In addition, you can spray water on the leaves or sprinkle water around the pot to increase the humidity of the air.

2. Correct fertilization

Lack of nitrogen fertilizer or boron fertilizer will cause the leaves of the orange tree to turn yellow. At this time, fertilizer containing nitrogen or boron should be applied. If there is a lack of nitrogen, you can apply farmyard manure or spray urea. If there is a lack of boron, you can apply boric acid. Boric acid liquid is also a good choice.

3. Change the soil quality

Orange trees are more suitable for living in acidic soil. If the soil is alkaline, it may cause its leaves to turn yellow or even fall off. You can add a little beer when watering, but be careful not to add too much. In addition, when choosing soil, you should choose fertile and well-ventilated soil. If the soil is dug from the wild, you should expose it to the sun.

4. Adding multiple elements

Lack of iron, zinc, manganese, etc. may cause the leaves of the orange tree to turn yellow. At this time, it is necessary to supplement the missing elements accordingly. If there is an iron deficiency, you can apply iron sulfate or a small amount of sulfur powder, which can also increase the acidity of the soil. If there is a lack of zinc, you can spray zinc sulfate solution on the leaf tips, but be careful not to make the concentration too high. If it is lacking in manganese, manganese sulfate can be mixed with other fertilizers and applied to it.

5. Pest control

Red spider mites may also cause the leaves of orange trees to turn yellow. At this time, you can spray them with 5000 times of mite danger suspension. In addition, 1000 times of 15bf mite sweeper can also be used.