Rose Leaves Curling? 5 Causes & Quick Fixes
Recently, many florists have been asking about rose leaf curl. Today, we will analyze in detail several common causes that may lead to curling of rose leaves and provide corresponding solutions.
1. Natural curling of young leaves (no need to worry)
In the spring, newly grown young leaves of roses may occasionally appear slightly curled. Many flower lovers may worry whether this means that there is something wrong with the plant.
- Reason: This is actually the natural reaction of roses to adapt to the changing environment, which is a normal phenomenon and does not require excessive intervention.
- Solution: Maintain normal maintenance can be, the new leaves will gradually stretch with the growth.
2. Excessive fertilization (fertilizer damage)
Spring roses grow vigorously, many florists will increase the amount of fertilizer, but excessive fertilization may lead to deformation and curling of new leaves.
Reason: too much fertilizer, beyond the rose’s metabolic capacity, resulting in “indigestion”.
Solution:
- Stop fertilizing immediately.
- Water liberally to help dilute the fertilizer in the soil.
- Usually after 1-2 weeks, the new leaves will resume normal growth.
3. Spraying too high a concentration of pesticide (drug damage)
Spring is a period of high incidence of pests and diseases, but if the concentration of spraying is too high, it may also lead to curling of leaves.
Reason: improper pesticide ratio, resulting in drug damage.
Solution:
- If the concentration is too high after spraying, rinse the leaves with water within 2 hours.
- Use drugs such as “antidotes” to alleviate the damage.
- Key preventive measures: Prepare the liquid in strict accordance with the instructions, and avoid adjusting the concentration at will.
4. Powdery mildew infection
Powdery mildew is a common disease of roses. When infected, leaves may appear curled and deformed, accompanied by a white powdery substance.
Identification:
- New leaves are twisted and curled.
- White powder appears on the back of leaves.
Treatment:
- Spray zinc diclofenac + carbendazim or epoxiconazole.
- Flower growers can use 75% alcohol diluted 200 times to wipe the leaves and spray the whole plant.
5. Micronutrient Deficiency (Soil Alkalization)
If roses are grown in excessively alkaline soil for a long period of time, problems such as curling, deformation and narrowing of new leaves may occur.
Cause: Soil alkalization affects the absorption of trace elements by the root system.
Solution:
- Avoid using fertilizers that are too alkaline (e.g. excessive grass ash).
- Regularly use acidic organic fertilizers (e.g. humic acid) to adjust soil pH.
- Supplement with micronutrient fertilizers such as iron and magnesium when necessary.
