What's Wrong with the Rose Leaves Not Unfolding Properly
This article introduces the knowledge related to why rose leaves do not unfold properly. Next, the editor will explain it for everyone.
What's Wrong with the Rose Leaves Not Unfolding Properly
① Over-fertilization of Roses Causes Fertilizer Damage
Roses grow rapidly, have a strong branching ability, and bloom a lot, which requires a lot of fertilizer. Many rose enthusiasts often over-fertilize when fertilizing roses, which easily leads to the occurrence of fertilizer damage.
After fertilizer damage occurs, it can lead to the leaves of the rose wrinkling and becoming twisted.
Solutions
Once fertilizer damage has occurred and the damage is done, it is only possible to reduce the amount of fertilizer. If the leaf tips become dry, pour a large amount of water to dilute some of the fertilizer effect.
If only the leaves are wrinkled, stop fertilizing for a period of time and wait until the new leaves grow normally before resuming fertilizing.
Fertilizing Suggestions
Although roses are suitable for large amounts of water and fertilizer, there is a certain degree of control. It is recommended to apply thin fertilizer frequently for the best results. You can apply a dilute fertilizer solution every 7-10 days. Chemical fertilizers are commonly used in flower cultivation, and the dilution concentration is recommended to be between 1000-1500 times.
② Excessive Watering Damages the Roots, Leading to Yellow and Twisted Leaves
In pot cultivation of roses, the biggest fear is excessive watering, which can affect the plant's ability to breathe and transport water, leading to yellow and twisted leaves.
Solutions
If the situation is not severe, temporarily control the water for a period of time, keeping the soil slightly dry. After a while, it can recover. If it is more serious and there is a large number of leaves falling off, check the roots and change the pot in time.
Watering Suggestions
Water roses only when the potting soil is dry. The standard is that there is no water stain at a depth of about 3 centimeters from the surface, and then water can be applied. Each time, water thoroughly to avoid waterlogging.
③ Pest Infestation Damages the Leaves
Another common reason for twisted rose leaves is pest infestation. Rose pests are quite serious. For example, the damage caused by aphids and thrips can lead to leaf twisting and deformation.
Solutions
If it is caused by pests, it is necessary to control the pests in time. Aphids mainly damage the tender leaves of roses, and applying pyrethroids or cypermethrin once or twice at the early stage of the disease can solve the problem.
Thrips can cause blisters, absorbing the sap of roses and leading to leaf twisting. When spraying, the entire plant should be sprayed.
Preventive Measures
Roses have many diseases and pests, so preventive measures must be taken. First, ensure the growing environment is sunny and well-ventilated. Secondly, spray pesticides for prevention during the seasons when diseases and pests are common. Regularly observe and address any abnormalities promptly.
④ Excessive Concentration of Pesticides or Foliar Fertilizers Causes Phytotoxicity
Roses really have many diseases and pests and require frequent spraying for prevention. Many新手 gardeners do not master the concentration when spraying and use a higher concentration of chemicals, which can cause phytotoxicity and lead to leaf curling. In addition, an excessive concentration of foliar fertilizers can also cause leaf twisting.
Solutions
If leaf twisting is caused by spraying or foliar fertilizers, it is recommended to cut off the leaves with significant damage and then keep the plant in a shaded area for a few days to recover. You can also spray some brassinolide to mitigate the phytotoxicity.
Spraying Suggestions
When spraying pesticides or foliar fertilizers on roses, be sure to pay attention to the concentration and dilute according to the instructions. Do not arbitrarily increase the concentration.
In addition, when spraying for prevention, pay attention to the frequency. It is usually sufficient to spray during the seasons when diseases and pests are common. Spraying preventively can be too general and is not as effective as treating promptly at the initial stage of the disease.
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