Why do gardenias turn yellow?
This article discusses the reasons behind yellowing gardenias and the causes of yellow leaves, as well as solutions for green plants and flowers. Keep reading to find out more!
Gardenias are relatively difficult to care for, especially in the north, where they are prone to yellowing leaves. There are several types of yellowing leaves in gardenias, and today, Xiaoqi will tell you about several reasons for the yellowing leaves of gardenias.
The first situation is the most common, where after keeping gardenias for a while, you'll find that the new leaves have green veins, but the rest of the leaf turns yellow. What is the reason for this? It is due to the alkalinity of the water and soil, which causes the soil to become alkaline. The gardenias lack iron elements, and in alkaline soil, iron cannot be absorbed. Therefore, the new leaves of the gardenias turn yellow. If you find this situation and it is severe, it is recommended to repot the plant. If only a few leaves have just started to grow, you can water the plant with ferrous sulfate, which should be diluted at a concentration of 1:1000, directly watering it into the potting soil. This will ensure that the new leaves gradually recover. Therefore, when keeping gardenias at home, it is essential to keep the soil acidic, and periodically, every 1-2 months, water with a ferrous sulfate solution to ensure the soil remains acidic and does not lack iron. This prevents the yellowing of leaves in gardenias.
The second situation is where the veins are yellow, and the rest of the leaf is green, eventually turning the entire leaf yellow. This situation often occurs after repotting gardenias. The main reason is root damage, which prevents the absorption of nutrients. Nutrients are supplied from the roots to the trunk and then分散 to the leaves through the veins. Without nutrient supply, the veins lack nutrients and gradually turn yellow, spreading to the rest of the leaf. This could be due to severe root damage during repotting, lack of fertilizer during maintenance, or excessive watering and poor ventilation leading to root rot. Analyze your maintenance situation accordingly to solve the problem effectively. If this situation occurs after repotting, you should allow the plant to recover and grow new roots, which will effectively alleviate the situation later on.
The third situation is where the lower leaves turn yellow in large areas. The main reason for this is a lack of water and fertilizer. For example, if you forget to water the plant and the entire plant wilts, the lower leaves will turn yellow and fall off after watering. If you do not fertilize for a long time and the plant grows quickly, the lower leaves will also show this condition. If there is a lack of watering or fertilizer, this situation will occur. Therefore, when keeping gardenias, ensure adequate watering, and when the soil surface is dry, water thoroughly. Provide fertilizers regularly and in the right amount, using multi-element fertilizers during the growing season and fertilizers high in phosphorus during the flowering season, about 2-3 times a month, following the principle of applying thin fertilizers frequently. This will ensure good growth and prevent yellowing leaves.
There are generally only these three situations for yellowing leaves in gardenias. Analyze your maintenance methods to determine which situation applies to you, and you can solve the problem effectively. Usually, try to give gardenias as much sunlight as possible since they are sun-loving flowers. The watering principle is to water thoroughly when the soil surface is dry. The pot does not need to be too large, and the soil should be kept breathable and well-draining. Regularly supplement with ferrous sulfate, and with these care methods, you basically will not encounter problems, and the gardenias in your home can grow very well.
The introduction above provides a detailed explanation of the reasons for yellowing gardenias and the causes and solutions for yellow leaves, which can be referenced by netizens.