The 4 Key Points of Post-Rain Management for Chinese Roses
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The typhoon has passed, but it still rains every day. After consecutive rainy days, the post-rain management of Chinese roses is very important. Let's talk about the key points and precautions for managing Chinese roses after the rain.
Key Points of Post-Rain Management for Chinese Roses
After consecutive rainy days, Chinese roses are prone to large-scale yellowing of leaves. The main reasons are as follows:
1. Severe black spot disease
Chinese roses easily get black spot disease after getting wet in the rain. With prolonged rain, it's impossible to spray pesticides in time for prevention, leading to a rapid progression of black spot disease in Chinese roses, causing large-scale black spots and yellow leaves.
2. Waterlogging causing root suffocation
If the soil's drainage is poor during prolonged rain, waterlogging easily occurs, leading to root suffocation in Chinese roses, which also causes a lot of yellow leaves. Whether it's potted or ground-planted Chinese roses, there is a high risk of waterlogging during consecutive rainy days, so it's important to drain the water in time.
3. Humidity after long rain and sudden sunny weather
After consecutive rainy days, the soil moisture content is particularly high. When the weather suddenly clears up, the soil moisture evaporates in large amounts under the scorching sun, creating a humid environment. Chinese roses are prone to heatstroke, showing a lot of yellow leaves.
To prevent severe issues in Chinese roses after the rain, we need to promptly address the following three tasks:
1. Timely drainage
During rainy days, drainage work must be emphasized. Do not let the soil accumulate water, especially for ground-planted Chinese roses. You must dig drainage ditches and plant the roses near them. Make sure to dig the drainage ditches deeper to let the rainwater drain away quickly. After the weather clears, loosen the compacted soil to increase soil aeration and allow moisture to dissipate in time.
2. Timely removal of yellow and diseased leaves
When Chinese roses have a lot of yellow leaves or black spot disease, it's important to remove the yellow and diseased leaves promptly to prevent the spread of pathogens and infection of healthy leaves.
If there are many yellow leaves, after removal, the leaves are significantly reduced or almost no healthy leaves are left. In such cases, it's important to control water, frequently loosen the soil, maintain good ventilation, and keep the potting soil slightly dry, which is more conducive to the growth of new roots and buds in Chinese roses.
3. Spray pesticides promptly after the rain stops