Rose needs to be kept in a sunny place, the environment should be ventilated and transparent, and acid fertilizer and phosphorus and potassium fertilizer should be supplemented regularly to promote continuous flowering. But many friends don't know what to do with the yellow leaves when they find them, or even let them develop, which will easily lead to the failure of the whole rose.
There are six potential reasons for yellow leaves of Chinese rose flowers, which can be properly adjusted according to their own conservation status and treated in time to make Chinese rose flowers recover as soon as possible and keep blooming all the year round.
Point 1: mycosis
The most common reason why Chinese rose leaves turn yellow is that they are infected with fungal diseases. If you notice some small circular spots on the leaves, the color of the spots may be yellow, red, purple or brown, and yellow leaves usually appear around the spots, which eventually leads to these yellow spots all over the leaves, and the whole rose is not spared. This is a very common leaf spot disease.
Hot and humid weather in summer is particularly prone to fungal diseases. Some leaf spots will appear red spots at the bottom of leaves first, and some will look like rust spots.
It is also very simple to prevent this fungal disease of Chinese rose. First of all, we must ensure that the surrounding environment is clean and hygienic. If dead leaves, fallen leaves and yellow leaves are found, they must be cleaned up in time and not left on the soil surface. At the end of the frost, you can prune the branches and cut off some weak leaves and branches.
Pay attention to watering as much as possible in the morning to avoid watering again. If you don't dry the leaves in time at night, it's easy to get fungal diseases. You can spray some fungicides on Chinese roses in early spring, or sprinkle some lime in late winter.
Point 2: There is not enough water.
Although the roses in the yard don't need to be taken care of often, they are drought-tolerant. If you find that the leaves of Chinese rose are yellow and withered, and there are no spots on the leaves, you should increase watering slightly at this time. If the soil is dry for a long time, the rose will go into dormancy. In dry and sunny weather, increase the number of watering.
Of course, excessive watering, especially potted Chinese rose flowers, should be avoided, and the soil should not be wet or stagnant for a long time.
The third point: Starscream
When the air is dry and the environment is not ventilated, the leaves of Chinese rose flowers are easily infected with red spiders. When they bite leaves, they leave saliva, which will eventually turn into spots, causing the leaves to turn yellow slowly.
Starscream is a kind of mite, which is very small and can hardly be seen in the right eye. Moreover, it was hidden on the back of leaves at first. Pay attention to regular inspection and find that when the spider is serious, the back of the leaf will turn red. If you want to kill Starscream, you should pay attention to spraying water regularly. If you want to spray some serious pests in the morning, you need to cut them off directly and spray abamectin or abamectin in time.
The fourth point: lack of nutrition
During the growth of Chinese rose, it is necessary to supplement fertilizer regularly to ensure its good growth. If there is not enough nitrogen fertilizer in the soil, it will easily cause the leaves to turn yellow. In this case, the method of not saving is simple. You can directly supplement some organic fertilizer water or common compound fertilizer, which will promote the recovery of rose.
Don't give too much nitrogen fertilizer, otherwise it will lead to too many leaves and less flowers.
The fifth point: changes in the environment.
Changes in the weather can also cause the leaves to turn yellow. When the weather gets cold or hot, the Chinese rose will be under pressure. The common cause of yellow leaves, yellow leaves and fallen leaves is the sudden change of temperature.
Another situation is that the ground temperature suddenly becomes higher, especially in summer, and the ground will absorb a lot of heat. At this time, the moon will radiate to the bottom of the branches of Chinese rose flowers, and the leaves at the bottom will turn yellow easily. To avoid this situation, we can spread some mulch on the soil surface, such as common pine needles and rotten sawdust, of course, not too thick, otherwise it will lead to long-term water accumulation.
If you want to avoid the yellow leaves of Chinese rose, you must maintain a suitable environment and avoid excessive watering. In the process of maintenance, you should keep the environment ventilated and transparent. If there are many branches and leaves growing at the bottom, they should be cut off to avoid affecting the ventilation and light transmission at the bottom of the branches.
Pay attention to regular inspection of pests and diseases. Once pests are found, they should be treated in time, and there should be more than 6 hours of light every day. The diseased leaves around should be cleaned up in time, and the fallen leaves should not be left on the soil surface.