What Causes the Wrinkling of Rose Leaves
Here is the knowledge about why the leaves of roses wrinkle, explained for netizens. Next, the editor will introduce this topic.
What Causes the Wrinkling of Rose Leaves
I have summarized 6 reasons that might cause the leaves of roses to wrinkle.
1. -- Pesticide Damage --
Roses need to be sprayed with pesticides regularly to prevent various diseases during their growth. If the concentration of the pesticide is too high when mixing, it may burn the tender leaves. When the leaves are fully expanded, the burned areas cannot stretch out, causing wrinkles. Generally, older leaves are more robust and resistant to pesticides. Even if they are burned, they will only show spots and not wrinkles. If you carefully observe the back of the wrinkled leaves, there will be visible scars. If wrinkles appear on new leaves, consider whether you have recently sprayed pesticides!
2. -- Fertilizer Damage --
Fertilizer damage usually occurs with foliar fertilizers, especially when the concentration is too high. Many people like to spray phosphorus and potassium fertilizer on roses. If the concentration is not properly controlled or if the fertilizer is from an unauthorized manufacturer, it can easily cause fertilizer damage. I have experienced fertilizer damage several times due to spraying phosphorus and potassium fertilizer. Fertilizer damage causing leaf wrinkles is relatively minor; severe cases can lead to the drying and falling off of new leaves.
3. -- Spraying Water or Sudden Rain followed by Intense Sunlight --
In this case, the leaves will start wrinkling from the edges, and there may be some spots on the leaves. Usually, these spots do not spread. If the spots spread, it can be determined to be a disease; if they do not spread, it is caused by sunlight.
4. -- Wind Damage --
If roses are placed outside on a windowsill or outdoors, the branches will sway back and forth in the wind. Since the leaves have many thorns, they can be damaged by the thorns on the branches when they come into contact. When the leaves expand, the areas that are pricked will have wounds, and the surrounding parts cannot stretch out.
5. -- Long Time Without Watering, followed by Excessive Watering and Fertilizing --
If roses have not been watered for a long time, the tender leaves may be in a semi-dehydrated state, and then encounter strong sunlight, causing burns or drying around the tender leaves. After that, if they are given a lot of water and fertilizer, the leaves will start to grow rapidly, but the burned parts cannot continue to grow, while the non-injured parts grow quickly, resulting in wrinkles.
6. -- Pest Damage --
Some tiny insects like to bite the tender leaves of roses. After the tender leaves are bitten by pests, they can also wrinkle. Common pests include thrips, which cause severe wrinkling when they bite tender leaves. Pesticides need to be sprayed to control them.
The above sharing of the reasons for the wrinkling of rose leaves is for reference and suggestion.