Yellowing of evergreen leaves: common causes and treatment

Evergreen, a lovely ornamental plant. Small potted plants can be placed on the desk, windowsill viewing. Medium-sized potted plants are suitable for being placed in the living room, next to the sofa as decoration, and can make the room full of green vitality. What if the evergreen beside him suddenly turned yellow?

Yellowing of Evergreen Leaves

1, normal aging

If properly maintained, evergreen leaves yellowing is normal metabolism, as the plant grows, the lower leaves begin to age yellow.

Solution: Evergreen normal aging leaves yellow do not need to worry, but the yellow leaves, residual leaves, some old leaves in the lower part of the plant should be trimmed in time.

2. Too much watering

Evergreen for the meat root system, most afraid of water by waterlogging, therefore, can not be watered more, otherwise easy to cause rotten roots, resulting in yellow leaves of Evergreen.

Solution: usually watering the right amount of water can be done, to do basin soil is not dry, rather dry, not too wet. In addition to summer to keep the pot soil moist, spring and autumn watering should not be too frequent. But must keep the air moist, if the air is dry also easy to occur evergreen leaves yellow and other undesirable phenomena.

3, the sun is too strong

Evergreen likes semi-shade environment, avoid direct sunlight in summer, direct sunlight is easy to cause Evergreen leaves to burn or even yellow, light is too strong and easy to be burned by the sun, light is too weak to bear fruit, affecting the viewing effect.

Solution: spring, summer, autumn evergreen should shade more than 60%, winter shade 40%.

4, the temperature is too low

Suitable growth temperature l5 - 18℃, the lowest temperature can not be lower than 5℃, otherwise it is easy to cause freezing damage, causing yellow leaves.

Solution: Evergreen winter dormancy should be moved into the greenhouse, placed in the sunny place, the temperature maintained at 10 ° C or more, the next year can re-germinate new leaves.

5. Excessive fertilization

Excessive fertilization is another common cause of yellowing of evergreen leaves, mainly caused by fertilizer damage, damage to the roots of evergreen, etc.

Solution: Evergreen growing season every 10-15 days dressing 1 liquid fertilizer, winter should stop fertilization.

6. Insect disease infection

Brown soft scale insects can also lead to yellowing of evergreen leaves. When brown soft scale harms evergreen leaves, it generally clusters on leaves or tender leaves, sucks plant juice and excretes mucus at the same time. Its excrement is easy to cause a large number of coal pollution bacteria to multiply, blacken stems and leaves, affect photosynthesis of plants, cause weak growth potential, yellow leaves and hinder viewing.

Solution: less plant victims, or the number of insects is not much, generally with bamboo and other things will be insect body scraping can be. If the insect hatching period can be used 40% dimethoate EC 1000 times (or 40% omethoate EC 1000 times) spray, but also can spray 5% pyrifos EC 1000 times to kill.

7. The leaves are too dirty

Evergreen usually pay attention to keep the leaves clean and tidy, if the accumulation of dust on the leaves of too much impact on photosynthesis, will also lead to yellow Evergreen leaves.

Solution: Every once in a while, pay attention to wiping the leaves with clean wet rags to keep the leaves clean.

Small knowledge: Evergreen general garden soil can be cultivated, but rich in humus, loose permeability of good slightly acidic sandy loam best.