What to do if Jianlan leaves turn yellow

Reasons for the yellowing of Jianlan leaves

Unsuitable soil

Jianlan has fleshy roots and a well-developed and strong root system, so it has relatively high requirements for soil permeability. If planted in heavy clay soil, it will affect the growth of the root system and cause the nutrient transport channel between the roots and leaves to be interrupted.

Improper lighting

Jianlan is an orchid variety that prefers light. If it is kept in the shade for a long time, the plant will lack photosynthesis, resulting in a decrease in chlorophyll and yellow leaves. If it is exposed to the sun for a long time and the light is too strong, the plant will easily be burned and the leaves will lose vitality.

Improper fertilization

Too much nitrogen fertilizer. Everyone knows that nitrogen fertilizer can promote leaf growth, but Jianlan has nodules on its roots, which have a certain effect of polymerizing nitrogen. Fertilizers applied over a certain period of time that contain high levels of nitrogen can cause fertilizer damage and yellowing of leaves.

Pest and disease interference

Root rot is one of the reasons why leaves turn yellow. If the rhizomes rot, the leaves on the ground will inevitably grow poorly, turn yellow, or even wither.

In addition, scale insect damage can also cause the leaves to turn yellow and the branches to be covered with insects, affecting the photosynthesis of the plant and causing the branches to slowly wither.

How to solve the yellowing of Jianlan leaves

Change soil, light

If you find that the soil is not suitable, change it immediately. You can choose professional orchid cultivation soil, which is suitable in terms of permeability and pH. Try not to use soil dug directly from outside, as the air permeability of such soil is not very good.

In daily care, place the orchid pot in a bright place. In spring and winter, it can be exposed to sunlight all day long and does not need shade. In summer and autumn, avoid the midday sun and provide appropriate shade.

Apply thin fertilizer frequently

The most taboo thing for orchids is heavy fertilizer. Flower lovers who do not know how to fertilize must learn it well and apply fertilizer in time when it is time to do so. The correct or incorrect application of fertilizer is related to the growth of Jianlan. Adhere to the frequent application of thin fertilizers and don't be lazy, so that Jianlan can grow healthily.

The hardworking editor provides you with a super simple method of fertilizing, go and take a look! →→ Fertilization method of Jianlan

Pest and disease control

If you find that the plants are infected with diseases and pests, you must deal with them in time. When the roots are rotten, remove the plant from the pot, clean up the rotten parts, soak it in disinfected water for 20 to 30 minutes, dry it and replant it.

If scale insects appear on the leaves, spray the pesticide in time. You can use 1000 times diluted omethoate.