What if the leaves of the latest orchids turn yellow?

The yellowing of orchid leaves or the scorched tip of orchids is a common phenomenon, which mostly belongs to physiological diseases, which not only damages the integrity and appreciation of leaves, but also seriously affects the healthy growth of orchids, and even leads to the premature decline of the whole plant. the occurrence of orchid leaves yellowing is complex, the general reason is improper cultivation and maintenance, let's take a look at the orchid leaves yellowing how to do!

Yellowing of leaves caused by excessive light

Orchids are semi-shaded plants, which are suitable for exposure to morning light, astigmatism and soft light. If the light time is too long and the light quality is too strong, it is very easy to cause the leaves to turn yellow and the leaf tail to be charred. The countermeasure is to adjust the light time and intensity timely in summer and autumn to avoid direct light. The most commonly used and easiest way is to use different specifications of sunshade screen, shading general variety 60% 80%, edge art, chimera art, crystal art, picture spot art to reach 90%.

Yellowing of leaves caused by dry air

When the air is moist, the orchid leaves are green and shining. If the air is dry, the texture of the leaf is rough and the focal tip phenomenon occurs from time to time. Especially in the dry, rainless and windy north, the air is often dry in spring, autumn and winter, and the phenomenon of blue leaf coke tip is particularly serious. The solution, when the air is dry, often spray to the leaves and sprinkle water to the ground. Can also be in the orchid basin under the sink, orchid shed, orchid indoor use nylon cloth to do pool, hang wet door curtain, install automatic spray humidifier.

Yellowing of leaves caused by miswatering

Like other plants, orchids cannot do without water, and underwatering or too much watering can cause losses. There is often this situation, because the basin soil is too full, watering is not much, that is, the outflow, the result is wet above and dry at the bottom, forming "half-cut" water. Over time, the root system first scorched from the leaf tip because of the loss of water from the root system. Another reason is that due to carelessness and leakage of water, this phenomenon is also easy to occur. On the contrary, both soil and granular plants are watered in the same amount on time, resulting in excessive wet anoxia, poor breathing, blackening and even rot of the root system, causing the orchid leaves to dry and burn. The countermeasure is to water the orchids timely and appropriately according to the growth habits of different orchids to prevent the occurrence of the above two bad tendencies.

Yellowing of leaves caused by excessive fertilization

Orchids are fleshy roots and symbiosis with orchids. As long as thin fertilizer is applied frequently, they can grow strong and fragrant. Such as excessive fertilization, especially raw fertilizer or thick fertilizer, will lead to root rot, leaf tip yellowing, premature senescence. The correct way is to apply fertilizer timely and appropriately according to different orchid varieties, different growth periods and different growth trends. If the root is fertilized, the liquid fertilizer retted by organic fertilizer must be mixed with 10% 20 times of clear water before use, while the chemical fertilizer should be prepared at 0.1% 0.2%, and applied once in about 1 month. Foliar spraying should be light rather than thick. If you use blue fungus king, spray Shibao and other micro-fertilizer, must be prepared in accordance with the product instructions, can not increase the concentration at will to avoid causing fertilizer damage.

Yellowing of leaves caused by abnormal physiological function of leaves

Some due to excessive nitrogen application, resulting in young leaves, resistance to retrograde decline, due to spraying fertilizer, pesticide concentration is too high, silting leaf tip, resulting in damage, due to ineffective cold prevention measures in winter, resulting in leaf tip frostbite. There are also orchid basin spacing is too small, leaf tip and leaf tip friction collision with each other, resulting in damage. The measures taken are treatment based on syndrome differentiation and taking the right seat. That is, the rational application of the three elements of nitrogen, phosphorus and potassium, the concentration of fertilizer spraying should be light rather than dense, do a good job of cold prevention and warmth protection in severe winter and early spring, increase the distance between basin and basin, and prevent the occurrence of phenomena affecting the physiological function of leaves.