What is the reason why orchid leaves turn yellow and dry?
The core introduction of this article: Related topics about the reasons for the yellowing and drying of orchid leaves, the following is a detailed introduction.
During the usual process of growing orchids, it is occasionally found that the orchid leaves turn yellow or withered. This growth phenomenon is caused by many factors.
First, the reason for normal grass decline.
The vitality of most orchids each plant is about three or four years; when the orchid grass germinates new buds, the leaves of the old seedlings gradually turn yellow from top to bottom and from the outside to inside, showing yellow and withered leaves. This is the result of normal decline and metabolism of the orchid leaves.
In addition, after transplanting orchids, due to the need to serve pots, the leaves of old seedlings will also be yellowed and withered.
Second, the reasons for maintenance and management.
Due to poor management, the orchid leaves turn yellow and withered; for example, the light is too strong, the orchid grass receives too strong sunlight and is exposed to the sun, and the orchid is not shaded in time, causing the orchid leaves to turn yellow and withered.
Especially at the turn of late spring and early summer, orchids should be given appropriate shade in time when the weather is hot, generally blocking the scorching sun until the Mid-Autumn Festival.
Secondly, due to frost, frostbite, etc., the orchid leaves turn yellow and withered, and anti-freezing work is done in the cold winter to ensure that the orchids can survive the winter safely.
Excessive fertilization will cause the orchid leaves to appear green, black, thick and shiny, but the leaf surfaces will not stretch and the old leaves will gradually become yellow and fall off; the treatment method for this situation: increase the amount of watering, rinse and dilute the fertilizer, and replace the plant material when severe.
If the plant material has not been replaced for a long time, or the particles are too big, the orchid pot is too small, the fertilizer and water are insufficient, and the fibrous roots age, the orchids are thin and tender, the leaves are thin and yellow, the nodes are long, and the branches are tender; the treatment method is to increase light, water, fertilizer, and change the pot in time.
When the orchid grass is dehydrated or insufficiently watered, the color of the apex and new leaves of the orchid plant will be normal, and the ear leaves, coating and lower leaves will gradually turn yellow and fall off; Treatment method: appropriate amount of water should be watered, if watered thoroughly, and keep the pot soil moist can be avoided.
On the contrary, excessive watering, hardening of plant materials, hypoxia, root decay, and blackening are manifested by scorched pointed orchid leaves, shrinking apices of new buds, pale yellow young leaves, and dark yellow old leaves; treatment methods require timely change of pots and reduce the number of watering.
Finally, the water and soil are too alkaline, which will cause the leaves to fade, turn yellow or fall off. The treatment method is to soak them in water with green grass, irrigate them after rot and fermentation, or irrigate them with ash water from vegetation. In the subsequent period, the plant materials should be kept loose and the drainage should be smooth.
All the reasons why orchid leaves are yellowed and dry are introduced above. I hope they can help you. Finally, don't forget to come and have a look for more experience and common sense!