What are the precautions for orchid farming, and what is the matter with the yellowing of orchid lea

Orchid, also known as Chinese orchid, spring orchid, orchid, orchid, national incense, fragrant ancestor and hollow valley fairy, is a common name for orchids.

In the process of cultivating orchids, it is found that the leaves are yellow, which may be due to too strong light, too weak light, too little watering, too little fertilization, too thick fertilization, etc., which need to be properly lighted, properly watered, properly fertilized and treated with roots according to different reasons.

Ways to improve yellowing of orchid leaves:

1.Prune the yellow leaves.

Solution: When the number of yellowing of orchid leaves is small and the area is small, you can not prune first, strengthen maintenance management, and wait for the leaves to slowly turn back to green, if the number of leaves yellowing is large and the area is large, and there are dry, drooping and malaise, etc., it may be because of the infection of germs, it needs to be sterilized with scissors and cut off with the petiole together, cut off and burned, and spray carbendazim on the plant to disinfect and sterilize.

2.Lighting management.

The yellowing of orchid leaves may also be caused by improper light, when the plant is exposed to strong direct light, the leaves will turn yellow when burned, or the orchid will be cultivated in a dim environment for a long time, and the leaves will fade and turn yellow due to the lack of light to synthesize chlorophyll.

Solution: After pruning off the yellow leaves, place them indoors with sufficient scattered light, and release them outdoors to receive light when the light is weak.

3.Water properly.

When orchids need a lot of water, too little watering can easily cause dehydration of the plant, and the leaves of the plant will not only turn yellow after dehydration, but also may wither.

Solution: It needs to be watered in time, watering follows the principle of "seeing dry and wet", watering when the surface of the soil is dry, and watering can only be stopped until the water seeps out from the bottom of the pot.

4.Root trimming and replanting.

When overwatering and fertilizing too thickly, it can cause damage to the roots, causing the roots to rot, and the rotten roots cannot deliver enough water and nutrients to the leaves, and the leaves will lack water and nutrients and the leaves will be yellow.

Solution: The roots need to be dug out of the soil, pruned to remove rotten roots, wilted roots and dense roots, apply carbendazim to the wound to disinfect, and then place it in a ventilated place to dry until the wound shrinks, and then change the soil and replant after the wound shrinks.

5.Reduce fertilization.

Long-term application of large amounts of fertilizer, or the use of fertilizers that are too concentrated, can easily cause the yellowing of orchid leaves.

Solution: Appropriately reduce fertilizer when fertilizing, and water once in the second article after fertilization to dilute the fertilizer.

6.Disease elimination.

When orchids encounter diseases, their leaves also turn yellow.

Solution: Observe the state of the orchid in time, and when there are pests and diseases, analyze it well, and use it scientifically.

If the fertilization and medicine are too concentrated, the leaf tips can also wither yellow, and the leaf surface will appear black spots, and gradually turn to brown, and the parts of the leaves are more tender and the places that are prone to accumulate liquid medicine, this situation will occur at the same time.

First, the selection of cultivation planting materials. Orchids must not be planted with ordinary soil, and must be loose and breathable. Second, the frequency of fertilizer and water.

Orchids like moisture but are afraid of stagnant water, like light and afraid of bad fat. 3. Light and ventilation. For any flower to grow well, it is inseparable from the right light.

Fourth, humidity and temperature. Orchid flowers grow in deep valleys, and the ambient humidity is naturally relatively high. At the same time, it is also necessary to do a good job in the prevention and control of pests and diseases, and it is necessary to give priority to prevention.

There are many causes of wilting. For example, the potting soil is too wet to cause rotten roots, and the potting soil is too dry to cause dehydration of the plant's reeds, excessive fertilization, low environmental humidity, natural aging and many other factors may appear yellow leaves, wilting.

Lack of water or lack of fertilizer, at this time we should pay attention to take care of them, and especially to give them the right amount of water, but also to fertilize them, so that they will grow more green and full.

1. Reason: Except for a few varieties such as orchids, most orchids do not like strong light. If they are raised in a place with high light intensity, their leaves will be sunburned and turn yellow by strong light.

2. Treatment method: At this time, the leaves that are completely yellowed on the plant should be cut off with scissors. Then, move it to a well-ventilated area without bright light, or use a blackout net to shade it. After waiting for a while, it can be restored.

1. Reason: Orchids like warmth and are not particularly cold-tolerant. If the plant is kept in a particularly cold place for a long time, it will cause it to grow poorly and its leaves will turn yellow.

2. Treatment: First move the orchid to a place with a temperature between 18-25, and then appropriately increase the time it receives light, and wait for it to recover.

1. Reason: If you do not water the orchid for a long time when you care for it, it will also cause its leaves to turn yellow.

2. Treatment method: At this time, it should be watered in time. Water thoroughly once first, and water the soil thoroughly, but don't let the soil become waterlogged. Then increase the frequency of watering to replenish it.

1. Water yellow, that is, too much water causes the soil to accumulate water for a long time, poor air permeability and even some fibrous roots rot. It shows that the young leaves are dark yellow and dull, and the new shoots are shriveled.

Second, fat yellow, that is, fat, manifested as the old leaves branch tips turn yellow and fall off, although the new leaves are thick and shiny, but generally uneven and unstretched. If it is a precious flower, you can sprinkle a layer of cabbage or radish seeds, and pull it out after a few days of emergence to consume nutrients.

3. Dry yellow, due to long-term lack of watering or dehydration, although the new leaves are normal in color, the lower leaves gradually dry and yellow fall off and age.

Fourth, alkali yellow, especially some southern flowers like acidic soil, while the northern water quality is alkaline, and the leaves gradually fade and turn yellow or even fall off. The easiest way to do this is to pour fermented rice washing water or rainwater.