Why are the leaves of gardenia turning yellow?
Introduction to the article: This article introduces the reasons why the leaves of gardenia turn yellow and the solutions to yellowing leaves in the field of green plants and flowers. Next, the editor will provide an introduction.
When the leaves of gardenia turn yellow, don't use ferrous sulfate directly. Identify the cause of yellowing leaves to make them turn green.
After entering winter, many gardenia enthusiasts find that their plants develop yellow leaves. Some think they lack fertilizer, while others directly apply fertilizer or even use ferrous sulfate, believing that it is caused by alkaline soil. However, the yellowing of gardenia leaves is not solely caused by alkaline soil. Using ferrous sulfate directly for yellowing leaves is not reliable. We need to find the cause of the yellowing to quickly restore the leaves. Today, let's talk about why gardenia leaves turn yellow.
1. Yellowing leaves due to low temperature
Because gardenia is a flower species from the south, it is sensitive to low temperatures and prefers a warm environment. It can tolerate high temperatures of up to 40 degrees Celsius in summer, but when the temperature drops to 5 degrees in winter, it will experience widespread yellowing and leaf drop. If you keep your gardenia indoors and the temperature is low in winter, yellowing leaves are quite normal. The obvious sign is that the lower leaves turn yellow and fall off in large numbers. If this is due to low temperature, moving it to a warmer environment can stop the yellowing and restore normal growth.
2. Yellowing leaves due to lack of fertilizer
Gardenia grows rapidly and produces large flowers, which consume a lot of nutrients. We need to fertilize it regularly, usually every two to three months with moderate concentrations. However, some enthusiasts use poor soil and do not fertilize, which is incorrect. If you do not fertilize regularly, you will notice that the lower leaves gradually turn yellow and fall off, sometimes severely. The main reason is a lack of fertilizer. If your indoor temperature is not low and you have not fertilized, it is recommended to add some fertilizer, preferably with a high nitrogen content. After applying it one or two times, the yellowing condition will significantly improve.
3. Yellowing leaves due to iron deficiency
Gardenia is a flower species from the south that prefers acidic soil. In the north, where the soil and water are alkaline, the leaves will inevitably turn yellow after some time. However, iron deficiency yellowing is evident in new leaves, where the veins remain green while the rest of the leaf turns yellow. In this case, it lacks iron. We need to supplement it with ferrous sulfate, dilute it to a 1:1000 concentration, add a few drops of vinegar to prevent oxidation, and apply it directly to the soil. This can significantly improve the condition after one application. Generally, applying it once every two weeks for two times can prevent yellowing. If the soil is severely alkaline and all leaves are yellow, it is recommended to prune the branches and repot to save the plant.
The three mentioned reasons are the most common causes for gardenia leaves turning yellow. Analyze your situation appropriately to find the cause of yellowing leaves, and the leaves will quickly turn green. Don't assume that yellowing leaves are always due to iron deficiency; you need to distinguish based on your care and the condition of the leaves.
The above provides a comprehensive introduction to why gardenia leaves turn yellow, the causes of yellowing leaves, and the solutions, hoping to bring some knowledge about green plants to green plant enthusiasts.