Why is the leaf tip of Cymbidium withered and blackened

Why does the leaf tip of potted orchid appear blackening, withering, shrinking and so on? How to prevent it?

Pot Cymbidium appears the phenomenon of leaf dust wilting and blackening, from the perspective of cultivation, there may be the following reasons.

First, the air is dry, the sun is too strong and the temperature is too high. This situation mainly occurs in summer and autumn, because Cymbidium likes to grow in humid and semi-overcast environment, once the air is too dry and the sun is unsheltered, and if the temperature is as high as 30 ℃ or above, it is easy to cause the leaf tip of the plant to wither. If this is the case, you can put the plant in a semi-shady environment, cut off the dead leaves, often spray water to the leaf surface and the environment, and the newly extracted leaves can return to the normal state.

Second, the basin soil stagnant water, nutrition fibrous root rot. Because the potted soil is too sticky or too heavy, or watering too frequently, the vegetative fibrous roots of Cymbidium are rotten, so the ability of the root system to absorb water will be greatly reduced, which will lead to the blackening of the leaf tip and the inner curvature of the edge. If this is the case, you can remove the plant from the flowerpot, shake off part of the persistent soil, cut off the rotten root system, replace it with clean wet sand, keep the sand moist, do not spray too much water, and wait for the emergence of white and tender whisker roots. and then replace the fertile culture soil for planting.

Third, without changing the basin for a long time, the root system grows directly to the basin wall. in the environment of high temperature, high drought or cold weather, it is easy to cause root tip atrophy and necrosis, making it lose its due absorption function, resulting in leaf tip drying and atrophy. If this is the case, you can first pour the plant out of the flowerpot, cut off the dead leaves or the necrotic parts of the leaves, then pick out part of the old soil, delete some aging or necrotic roots, and plant them with fresh culture soil. put it in a cool, moist, semi-shady environment, pay attention to more water spraying, less watering, the newly drawn young leaves of the plant can return to normal.