What should be done when the roses keep turning yellow leaves and multiple treatments have no effect?
This article provides a brief introduction to the small green plant maintenance experience of dealing with yellowing leaves of roses that are unresponsive to treatment, and will take everyone to understand together.
Roses keep turning yellow leaves, and many treatments have been tried without any effect. What should be done?
Many flower enthusiasts have probably encountered this situation. The roses keep turning yellow and falling leaves, and no matter what methods are tried, the problem cannot be solved. In fact, the root cause is not finding the reason for the yellowing leaves.
Let's take a look at this flower enthusiast's roses and see what caused the yellowing leaves and why the treatments didn't work. First, let's look at these fallen yellow leaves.
It can be clearly seen that this yellow leaf is an old one. The order of yellowing is the veins first, followed by the leaf flesh turning yellow and easily falling off. This is typical metabolic yellowing.
Metabolic yellowing is common in any plant. During the growing season, metabolic yellowing usually occurs individually or occasionally, but during the season change, the amount of metabolic yellowing often increases significantly.
Therefore, in autumn or when the temperature drops in late autumn, if roses suddenly have a large number of yellow leaves, there's no need to be too nervous. It's simply the acceleration of metabolism due to weather changes, as the saying goes, "The autumn wind sweeps the leaves." In the deep autumn, after a cold wind at night, it's possible that all the leaves of roses will turn yellow and fall off, entering a dormant period.
This kind of natural metabolic yellowing doesn't need attention, but if it's problem-related yellowing, immediate action is required. For example, as shown in the following picture.
What should be done when the roses keep turning yellow leaves and multiple treatments have no effect?
New leaves showing chlorosis-type yellowing are considered problem-related yellowing. The apparent reason for this type of yellowing is a deficiency in nutrients, with iron deficiency being the most common.
This kind of yellowing won't respond to fungicides or insecticides. For yellowing caused by nutrient deficiencies, direct supplementation of microelement fertilizers is needed, such as applying chelated iron foliar spray for iron deficiency, or supplementing calcium fertilizers for calcium deficiency. In short, supplement what is missing, and timely correction of yellowing is the key treatment direction.
However, simply supplementing what is missing is not enough. If you don't know why your roses are deficient in nutrients and continue to care for them using previous methods, the possibility of nutrient deficiency occurring again, or even in large numbers, is very high. Normally, well-maintained roses rarely show obvious signs of nutrient deficiency. Only by finding the root of the problem can the issue be completely resolved.