What should I do if my roses suddenly have many yellow leaves after consecutive rainy days?
Compared to the explanations about green plants and flowers for most people who face the issue of roses turning yellow after consecutive rainy days, let's understand this together below.
What should I do if my roses suddenly have many yellow leaves after consecutive rainy days?
This year's weather is really tough; although the typhoon "Yanhua" has passed a long time ago, we still get heavy rain every day. After the continuous rain, we may notice that some roses are not in good condition, with severe yellowing leaves and black spots. If your roses are also in bad shape now, please pay attention to the following points.
1. Remove yellow leaves
For roses with a large area of yellow leaves, the first thing to do is to remove the yellow leaves. These leaves, whether hanging on the branches or falling into the pot, are likely to cause diseases and pests in the roses, and they are also unpleasant to look at. Removing them early is a wise choice.
2. Clear weeds and loosen soil
After long periods of rain, the area around roses planted in the ground is often infested with weeds, which should be removed promptly.
Weeds not only consume a lot of nutrients in the soil but also, if they grow too densely, can severely affect the ventilation of the roses, leading to black spot disease and even stem rot.
Not only do roses planted in the ground have weeds, but potted roses often grow some weeds as well. It is recommended to clean them up early before the weed roots grow deep, as it becomes more difficult and may damage the fine roots of the roses.
3. Use root stimulants appropriately
What should I do if my roses suddenly have many yellow leaves after consecutive rainy days?
For roses that have shed many leaves after getting wet in the rain and have weakened significantly, it is likely that their roots are a bit闷 (stagnant). It is recommended to loosen the surface soil promptly. If it's a potted plant, you can first flood the roots with plenty of water to refresh the soil environment, then flood the roots with a mixed solution of myclobutanil and root growth promoter to kill germs and promote new root growth in the roses.
4. Use soil insecticides promptly
For roses planted in the ground, it is recommended to use another round of insecticides targeting soil pests, such as trichlorfon or phoxim, to prevent the larvae of beetles and longicorn beetles. These two pests are quite destructive, so caution is advised. Last year, a green plant enthusiast's website had about four or five roses destroyed by the larvae of beetles and longicorn beetles. Everyone should take this seriously. Potted roses are relatively better, but it is still recommended to take preventive measures.
5. Apply fungicides and insecticides promptly
Also, after long periods of rain, black spot disease is bound to break out. It is recommended not to wait for the weather to stabilize before applying pesticides. The development of black spot disease is rapid, and the longer you wait, the worse it gets. Moreover, there are many caterpillars and thrips now. It is recommended to spray with two fungicides and 1-2 insecticides.
6. Control fertilizer and water