How can the heart of the orchid leaf not open into a column?

Orchid leaf heart can not be opened, into a column, that is, it stops growing, or the growth rate is very slow, resulting in the heart of the leaf can not be opened. There are many reasons for the slow growth or cessation of orchid growth, among which there are three main points: temperature is not suitable for growth, lack of fertilizer, and too little watering. Below I would like to talk about the formation of these three reasons and detailed solutions.

The temperature is not suitable.

For most orchids, the growth rate is faster when the temperature is between 15 and 25 degrees. When the temperature is lower than 10 degrees and higher than 28 degrees, the growth rate slows down and gradually enters a dormant or semi-dormant state. The lower or higher the temperature, the deeper the dormancy of the orchid and the slower the growth rate. So it is normal for orchids to grow slowly or stop growing when the weather is colder in winter and hotter in summer. When the temperature returns to the stage suitable for growth again, it will grow rapidly and the leaves will open quickly.

Lack of fat

If there is no temperature problem, the new leaves and buds of orchids grow slowly, and the leaves can not be opened for a long time, it is necessary to consider whether there is a lack of fertilizer. The main symptoms of lack of fertilizer in orchids are: slow growth rate, yellow leaves, faded gloss and so on. If the failure to open the new leaves of orchids is caused by a lack of fertilizer, you can properly apply a little nitrogen fertilizer or a balanced compound fertilizer of nitrogen, phosphorus and potassium, once every 10 to 15 days, and the new buds and leaves can resume growth. Note that it is said here that when the temperature is suitable for growth, when the temperature is too high or too low, even if the orchid is short of fertilizer, it should be treated with caution. Because the temperature is not suitable, the orchid metabolism is slow, the demand for fertilizer is not strong, easy to produce fat injury.

Too little watering

The growth of orchids is inseparable from the support of water, if the long-term watering is too little, the plant material is too dry, the new seedlings and new leaves will be difficult to maintain good growth, or even gradually yellow and dry. Therefore, watering orchids must follow the principle of dry and wet, and water them when they are dry. Some flower friends do not dare to water when the weather is relatively hot, for fear of rotting roots, which causes the orchid to grow poorly or die directly due to lack of water. In addition to the slow growth of underwatered orchids, the color and glossiness of the leaves are not strong, and they do not look very attractive. However, I just suggest that the amount of water should be increased properly when there is too little watering. If there is nothing wrong with your watering, don't water too much in summer. The root system is easy to rot in hot and humid environment.

Conclusion: through the above analysis, it is not difficult to see that the new leaves of your orchids can not open now, and the columnar shape is mainly caused by high temperature and dormancy of orchids. It is suggested that we should continue to take good care of it and avoid the water in the heart of the leaves. After the weather is cool in autumn, apply a little compound fertilizer properly, and it will naturally open and grow smoothly.