What to do if the leaves of the Chinese rose lack elements and turn yellow?
If you want to learn about the content related to the Chinese rose leaves turning yellow due to a lack of elements, the editor will introduce it next.
Yesterday, a flower enthusiast asked, what is the cause of the extensive light yellowing of the Chinese rose leaves? Let's take a look together and see what symptoms they are.
As seen in the picture above, the new leaves of this Chinese rose are generally light yellow and chlorotic. This symptom of light yellowing and chlorosis in new leaves is a typical sign of element deficiency. However, when a large number of leaves turn yellow and chlorotic, especially in early spring, it is necessary to analyze the causes of element deficiency in depth and address them accordingly.
Common Causes of Element Deficiency in Chinese Roses
Chinese roses have a relatively high demand for trace elements. If grown in the ground, they generally do not show obvious symptoms of element deficiency. However, element deficiency symptoms often occur in potted plants, mainly due to the following three reasons.
1. -- Physiological Element Deficiency --
Physiological element deficiency often occurs in summer when the weather is hot. Due to high temperatures, the Chinese rose may have poor root absorption, resulting in chlorosis and leaf discoloration.
Attention should be paid to supplementing iron fertilizers when entering summer. You can use ferrous sulfate buried shallowly around the pot or spray chelated iron on the leaves, or use slow-release fertilizers containing trace elements. When element deficiency occurs, chelated iron should be sprayed on the leaves regularly to correct yellowing.
2. -- Improper Potting Soil Mix --
What to do if the leaves of the Chinese rose lack elements and turn yellow?
The second reason for element deficiency in Chinese roses is the issue of potting soil mix. Why is it that Chinese roses grown in the ground do not easily get element deficiency? It is because the soil contains a complex nutrient composition and a relatively high amount of organic matter, while potted Chinese roses rely entirely on artificial soil mix.
The commonly used planting substrates now are peat, coconut bran, fermented pine bark, and perlite, which have good water permeability but low nutrient content. The substrates inherently contain insufficient trace elements, and with repeated watering and leaching, the nutrients in the potting soil are lost more quickly, leading to element deficiency symptoms.
Therefore, in the book "How to Grow Chinese Roses from Scratch," Green Plant Enthusiast Network emphasizes that the soil should be diversified and complex, with fermented organic fertilizers as a base. Diversifying the soil mix is an important measure to prevent element deficiency in potted plants.
Since potted plants are watered frequently, it is recommended to use water-soluble fertilizers containing trace elements more often, or use water-soluble or slow-release fertilizers containing trace elements separately.
3. -- Root Damage --
Root damage is another major cause of element deficiency in Chinese roses. When caring for potted Chinese roses, improper watering can lead to root rot or over-fertilization, causing root damage, which affects the plant's absorption ability.
When the roots of Chinese roses are in a poor absorption state for a long time, the plant may show various symptoms of element deficiency, not just iron, but also calcium, magnesium, or even nitrogen deficiency. Therefore, when Chinese roses have root damage leading to element deficiency, it is not enough to just supplement iron.
A better approach is to change the small pot in suitable weather conditions or maintain the original pot, first flush with a large amount of water to update the soil environment, then apply root growth powder and metalaxyl to promote root growth while killing harmful bacteria in the soil.
Then, it's time to supplement medium-element fertilizers. You can use water-soluble trace element fertilizers, applying them to the leaves every 5 days. For convenience, you can sprinkle slow-release trace element fertilizers around the pot and combine it with weekly foliar sprays. The Chinese rose will recover more quickly. Once new roots grow and absorption is normal, foliar sprays can be stopped, and only slow-release trace element fertilizers can be used to correct and prevent element deficiency.
The above information from the Green Plant Enthusiast Network on the common causes of element deficiency in Chinese roses and detailed introduction on what to do if the leaves of Chinese roses lack elements and turn yellow, have you understood it?)