Reasons and Solutions for the Yellowing Leaves of Jasmine
Jasmine is known for its delicate fragrance and elegance, but yellowing leaves often cause problems during its care. This article systematically analyzes the three main causes of yellowing leaves in jasmine and their corresponding solutions, and also adds two common triggers to help you quickly diagnose and rescue your beloved plants.
Yellowing Leaves Due to Nutrient Deficiency
Recognition of Deficiency Symptoms
Jasmine is a typical plant that thrives on fertilizer. When new leaves turn yellow and old leaves fade, it often indicates an imbalance of nitrogen, phosphorus, and potassium elements. If yellow spots appear between the veins, it may be a deficiency of trace elements such as iron or magnesium.
Scientific Fertilization Plan
It is recommended to apply a special slow-release fertilizer for jasmine every month, combined with foliar application of chelated iron fertilizer. When repotting, mix decomposed leaf soil with bone meal in a 4:1 ratio to effectively improve soil fertility.
Improper Water Management
Standards for Diagnosing Waterlogging
When the bottom leaves turn yellow and fall off first, and the soil remains moist to the touch for more than 3 days, be alert to waterlogging and root rot. Special attention should be paid to the moisture difference between ceramic and plastic pots, as the former evaporates faster.
Emergency Rescue Steps
Use a bamboo stake to deeply check the moisture of the potting soil. If waterlogging is found, immediately elevate the pot. Enhance aeration by covering the surface with pine needles and switch to the immersion method for watering during the recovery period.
Prevention and Treatment of Disease Infection
Recognition of Common Diseases
(T-J) disease presents round brown spots, leaf blight causes leaf edges to burn, and powdery mildew covers the leaves with a white powdery substance. It is common during the plum rain season and requires special attention to check the leaf undersides.
Comprehensive Control Strategies
After pruning the diseased leaves, spray with benomyl, focusing on the undersides of the leaves. Wiping healthy leaves with garlic extract solution weekly can enhance disease resistance.
Optimization of Light and Soil
Key Points for Light Control
Ensure 6 hours of direct sunlight in spring and autumn, and 30% shading in summer. Combine a south-facing windowsill with a grow light in winter to prevent yellowing leaves due to low temperatures.
Soil Improvement Plan
Water with a solution of ferrous sulfate every quarter to adjust the pH, mix in 5% rice husk charcoal to improve compaction, and use pine needles to cover the surface and maintain root aeration.
Through systematic analysis, it can be seen that the yellowing of jasmine leaves is the result of the combined action of multiple factors. It is recommended to establish a care log, record the watering and fertilizing schedule, and adjust the care strategy in line with seasonal changes. Regularly rotate the pot to ensure even exposure to light, combined with preventive medication, to keep the jasmine leaves green and fragrant.