Reasons and solutions for yellowing orchid leaves

The orchid is one of the top ten famous flowers in our country, and since ancient times it has been regarded as a symbol of nobility and elegance. Our country has a history of more than two thousand years of orchid cultivation. As one of the precious flowers, orchids are deeply loved by many people. Many people value the market profits involved and have begun large-scale orchid cultivation, but many flower growers encounter the phenomenon of orchid leaves turning yellow when planting, which seriously affects the quality of the orchids and reduces economic returns, making people very frustrated. But they do not know how to solve it. Let us take a look at the detailed introduction below.

1. Too much light

Orchids prefer a shady growing environment and are quite demanding about light; they are not suited to long periods of exposure to light. When planting, some flower growers, through improper handling, expose them to sunlight for long periods, so yellow leaves are very likely to result. Although they cannot be exposed to light for long periods, their growth cannot be separated from light either. If 1 the light period is too short, the leaves will lose their luster and gradually shrivel.

Solution: For leaf yellowing caused by light, the orchid can be moved to a shady place, such as inside a greenhouse, using the greenhouse to block the intense sunlight, and watered a little; after about a few days, the leaves will slowly return to normal. If the leaves have already begun to wither, do not cut them off just for the sake of appearance; just let them fall off on their own, so as to avoid wound infection by bacteria.

2. Overwatering

Orchids like a moist environment during growth, but if watered too much, it is very easy to cause a “drowning” phenomenon, which then leads to yellowing leaves. This is because too much watering causes excessive water accumulation in the soil, and combined with poor soil drainage, the soil has poor permeability, so the root system suffers from lack of oxygen and ultimately rots, producing yellow leaves.

Solution: When planting, master the correct watering method. Generally, water when the soil is dry. Do not water too much at one time; just keep the soil in a state of being neither dry nor wet. At the same time, also pay attention to air humidity. If the air is too dry, humidity can be increased by spraying water. If planting outdoors, pay attention to drainage and waterlogging prevention measures after rain.

3. Improper fertilisation

As with growing other crops, if you want orchids to grow quickly and strongly, fertilisation is essential. Nitrogen fertiliser can make plant leaves grow quickly. But orchid roots have root nodules and have a certain ability to accumulate nitrogen themselves, so the amount of nitrogen fertiliser applied must be controlled. However, some flower growers, in order to make them grow quickly, apply large amounts of nitrogen fertiliser, causing the nitrogen content in the soil to be too high, resulting in fertiliser damage, which then leads to yellowing leaves.

Solution: Grasp the techniques when fertilising. Apply fertiliser thinly each time. Remember not to apply concentrated fertiliser, and do not apply undecomposed liquid fertiliser. After fertilising, water once to dilute the fertiliser so the plant can absorb it better and fertiliser damage is prevented.

4. Pests and diseases

When planting orchids, pests and diseases are often encountered. Many pests and diseases harm orchid leaves and ultimately cause the leaves to turn yellow, and in severe cases cause the orchid to die. Pests and diseases are especially serious during the high-temperature and high-humidity period in summer. When they break out, people are often helpless and can only watch the orchids being destroyed.

Solution: Strengthen the prevention and control of pests and diseases when planting. After discovering pests and diseases, handle them promptly. According to the different symptoms of the pests and diseases, determine which pest or disease is causing the harm, then apply the right treatment and carry out treatment measures well, and prevent yellow leaves.

The above is the full content of what to do when orchid leaves turn yellow. I hope it can help you. If you want to learn more about orchid cultivation knowledge, please stay tuned to us.