What are the symptoms of slight fertilizer damage in Chinese roses?
A detailed introduction about the early detection of fertilizer damage in Chinese roses in early spring is a topic about flowers and plants. Next, the editor will introduce it to everyone.
In the rapid growth period of Chinese roses in spring, regular fertilization is very important for the flowers. If the fertilizer is insufficient, a large number of new branches of Chinese roses will become blind branches without flowers, leading to a decrease in the number of flowers in spring. However, if too much fertilizer is applied, fertilizer damage will also occur. If it is not detected in time or the damage is severe, it will not only affect the flowering of Chinese roses but also may cause them to break directly.
Early detection of fertilizer damage in Chinese roses in early spring
When fertilizing Chinese roses in early spring, it is important to apply thin and frequent fertilization. The dilution ratio of water-soluble fertilizers or nutrient solutions should be adjusted according to the condition of the rose seedlings.
When the rose seedlings are strong and the new branches are thick and in a rapid growth period, the concentration of the fertilizer can be used according to the maximum concentration specified in the instructions. For example, for Huaduo No.1 fertilizer, the recommended concentration is 600-1500 times. At this time, potted plants can use a concentration of 800 times, while for ground plants, a concentration of 600 times can be used.
However, if our rose seedlings are weak, we need to be careful when using water-soluble fertilizers. If the concentration of the fertilizer is too high, it can lead to the loss of water in the new branches of the Chinese roses, causing them to wilt and eventually die. This is because the high concentration of fertilizer has severely damaged the root system of the Chinese roses, and if it is not detected in time, it can be difficult to save them.
Therefore, when fertilizing in early spring, it is important to adjust the concentration and frequency of fertilization according to the condition of the seedlings. If you are worried about insufficient nutrition in Chinese roses, you can combine foliar spraying with foliar fertilizer to supplement. The absorption effect of foliar spraying is faster, and even if the concentration of fertilizer is high, it will not directly damage the root system of the Chinese roses. It is important to observe and adjust in time when signs of fertilizer damage are detected.
What are the symptoms of slight fertilizer damage in Chinese roses?
Applying a large amount of fertilizer in spring and frequent fertilization can easily cause fertilizer damage. When the damage is mild, timely adjustment will basically not affect the normal growth of Chinese roses. Slight fertilizer damage in Chinese roses usually has the following manifestations.
1. - The tips of the leaves or the edges of some leaves turn yellow in a small area -
If the tips of the Chinese rose leaves turn yellow after fertilization, it indicates that the concentration of the fertilizer is too high and fertilizer damage has occurred. In this case, you should first pour a large amount of water at the roots to dilute the fertilizer in the soil and pause fertilization for a week. After that, fertilization should be done at a reduced concentration to avoid fertilizer damage again.
High fertilizer concentration can burn the leaves not only by root irrigation but also by foliar application. If the fertilizer water stays on the leaf tips for a long time and the concentration is relatively high, it can easily cause leaf tip burn and yellowing.
2. - The new leaves are small and deformed -
The fertilizer damage that causes the tips of the Chinese rose leaves to turn yellow directly is relatively obvious. There are other symptoms that are more隐蔽, such as the deformation of new leaves and uneven leaf surfaces. This is also a symptom of fertilizer damage, but it is milder compared to yellowing leaves. It is similar to the Chinese roses having indigestion. In this case, it is recommended to stop fertilizing for a few days. During the rapid growth period of Chinese roses, this type of fertilizer damage generally has a small impact and can be resolved by allowing the roses to grow without fertilization, after which the new leaves will gradually return to normal.
3. - The leaf surface appears discolored spots -
Compared to deformed new leaves, the fertilizer damage that causes local burn spots on the leaves is the mildest and has the least impact on the growth of Chinese roses. This type of damage often occurs after foliar application of fertilizer and is manifested as local and scattered burns. This phenomenon is most likely to occur when foliar fertilizers are applied in sunlight. Sometimes even spraying water alone can cause burns in sunlight. Therefore, whether it is spraying fertilizer or applying pesticides, it is recommended to do so in the evening, which is better.
The methods introduced in this article about the early detection of fertilizer damage in Chinese roses in early spring and the symptoms of slight fertilizer damage in Chinese roses are for reference only.