The weather is extremely hot this year, and many flower lovers have problems with their roses. For example, in the rose flower below, it is obvious that the new leaves are obviously yellow, and the terminal buds are curled or pointed. On the other hand, the tips and edges of old leaves are scorched, which looks like fertilizer damage. So why do these phenomena occur?
When roses have such symptoms in summer, the root cause is root damage, and the cause of root damage is usually the following.
1, drought and water shortage
The weather in summer itself is hot, evaporation is large, and water is consumed quickly, especially for outdoor potted rose plants. The pot soil can easily dry out. If the watering is not timely, the capillary roots of the rose will be damaged due to drought. , coupled with sunlight exposure, the leaves are easily scorched due to extreme lack of water, and the leaf tips or leaf edges will dry up, which is similar to symptoms of fertilizer damage.
If the rose has more leaves, it is best to water it in the morning and evening in summer to preserve sufficient water. Of course, the premise is that the potting soil has good air permeability and there will be no water accumulation. If the potting soil has poor air permeability, watering Be careful when using water. Stagnant water can easily cause rose root rot, making it even more difficult to save.
2. The temperature of the pot soil is too high.
Most of the roses that are prone to problems in summer are potted. Because the flowerpots are relatively small, the temperature of the pot walls is very high when exposed to the sun, and many of the capillary roots of potted roses are close to the The wall of the flower pot is long, so it is easy to be burned to death. If the capillary roots are burned to death, the absorption capacity of the rose root system will be greatly reduced. In addition, the temperature of the pot soil is also very high. At this time, the rose will easily show yellow leaves, Growth stagnation and other problems.
3, watering at noon
Watering at noon in summer is taboo, because it is too hot at noon. First, the temperature of the pot soil is very high, and the temperature difference is large when the water is poured, which is not good for the root system. But this is not the most important thing. What is more important is , after water is poured into the soil, the soil has a lot of moisture, and then it will be very hot when exposed to the sun. At this time, the root system of the rose is like soaking in warm water. It is not only hot, but also stuffy, and there is not enough oxygen to participate in the root system. If you breathe too hard, the roots will rot easily.
Therefore, try to water the rose sooner or later in the summer. However, if you find that the plant is already short of water at noon, you still need to water it at this time, because occasionally watering at noon will cause limited damage to the rose root system, but if Without watering, the rose will die of drought in one afternoon.
How to make roses spend the summer better
In such hot weather as this year, it is recommended to shade the roses, or only give them half-sunlight in the morning. After shading and cooling, the water in the roses will evaporate more slowly, and the pressure of watering will increase. It can also be much less.
In addition to shading and cooling, you can also sprinkle more water on the walls and ground of the flower pots at around 4 p.m. every day to cool down. If there is grass or mud, it is best to place the flower pots on the grass. Compared with the cement floor, It's much cooler on the grass. It cannot be placed on the grass. It is recommended not to place it directly on the cement floor. At least get a wooden flower stand and place it on the flower stand to enhance ventilation and avoid being exposed to the heat radiation of the ground.
For potted rose shrubs, it is recommended to temporarily stop using quick-acting fertilizers in summer to avoid fertilizer damage causing black stems.
More rose breeding strategies are available on my official account: Blue Demon Garden
