There are many reasons for the yellowing of the leaves of the lemon tree, if it is caused by a lack of nutrients, the need for moderate fertilization, increase nutrients; if it is caused by insect pests, the need to spray agents to eliminate insect pests; if it is caused by root rot, the need to prune the roots; if it is caused by high-temperature exposure, the need for proper shade.

A, increase nutrients

1, reason: lemon in the growth, need a constant supply of nutrients, nutrient deficiency will appear leaf yellowing.

2, the solution: found that the leaves turn yellow first do not add nutrients, add the process a little slow, so that it is easier to accept. If the nutrients are added after the disease has not been relieved, we must consider is not iron deficiency and lack of pigment yellow flowers, this case of spraying Wo Ye leaf leaf fertilizer can be.

Two, eliminate pests

1, cause: pests will affect its health, the leaves will turn yellow.

2, the solution: spray the branches and leaves with diluted insecticide, if there are also pests in the pot, you need to change the potting soil for it, and the changed potting soil should be sterilized.

Three, treating the roots

1, cause: root rot, mostly caused by too much watering or fertilizer is too strong, which will directly affect its ability to absorb nutrients, the yellowing of the leaves is not surprising.

2, the solution: the first need to clean up the rotted roots, and then in the incision coated with diluted liquid, such as the incision drying scars, and then cover the soil. After covering the soil, water as little as possible to avoid re-infection.

Four, appropriate shade

1, reason: lemon like sun but do not like the sun, sun exposure after the leaves will be yellow.

2, the solution: if it is potted culture, it can be moved back to the house when the sun is strong, such as strong sunlight over and then moved out; if it is outdoor culture, you need to take measures to shade at noon, placed it is exposed to the sun.