Why do the leaves of gardenias turn yellow?
The editor will answer why the leaves of gardenias turn yellow and share the topic of remedies for yellowing leaves of gardenias and other plants. Let's follow the editor to find out!
It is common to see yellowing leaves during the maintenance of gardenias. In fact, there are many reasons for the yellowing of gardenia leaves in actual production. This issue summarizes the following common points, let's take a look together!
【1】Improper watering and fertilizing:
When the leaves of gardenias turn yellow, improper watering and fertilizing are the main culprits:
On one hand, excessive watering can lead to waterlogging and root rot, which in turn causes the leaves to turn yellow; if there is a long-term lack of water and insufficient humidity in the air, it can also cause the leaves to become dry, yellow, and brittle, easily breaking upon touch.
On the other hand, if there is too much fertilizer, the leaf veins will lose their green color and turn yellow; insufficient fertilizer can also cause the plant to turn yellow, for example, when there is a lack of iron, the leaves are usually light yellow or white, while the veins remain green.
【2】Unsuitable light and temperature:
Insufficient sunlight can cause the leaves to turn yellow or even fall off; excessive sunlight can cause yellow spots on the sun-exposed parts of the leaves. Moving the plant to a shaded area for maintenance can help it recover, and the new leaves will not have yellow spots.
In addition, during the high-temperature summer months, excessive light and temperature can cause the leaves to get sunburned, resulting in yellowing and wilting; in winter, leaves in low-light and low-temperature conditions are prone to yellow spots. Therefore, it is important to provide shade and prevent freezing during the summer and winter growing seasons.
【3】Poor ventilation:
Gardenias require a ventilated and humid environment with bright light. If the plants are too dense, poor ventilation can lead to yellowing of the leaf edges. Maintenance should include timely pruning and thinning to increase ventilation and light, reducing the occurrence of yellow leaves.
【4】Metabolism:
The flowering period of gardenias is from March to July. After the flowering period and during the vigorous growth period, the metabolism of old and new leaves can lead to yellowing. This is a very normal phenomenon of survival of the fittest. Maintenance only requires timely removal of the yellow leaves.
【5】Pest and disease damage:
When there are symptoms of disease and pest infestation, it can result in yellow or even black leaves. Common diseases and pests of gardenias include whitefly, leaf spot disease, and yellowing disease. It is important to take timely measures for prevention and control.
The above information about why the leaves of gardenias turn yellow and the shared experience of remedies for yellowing gardenia leaves, I hope this article can be of some help to you!