What to Do When the Leaves of a Fortune Tree Turn Yellow with Spots
As a popular indoor ornamental plant, the problem of yellowing leaves with spots on the fortune tree困扰s many caregivers. This not only affects its ornamental value but may also indicate potential health issues for the plant. This article systematically analyzes the solutions to yellowing leaves from four dimensions: water management, light adjustment, nutrient supplementation, and disease prevention.
I. Scientific Watering Management
1.1 Seasonal Watering Amount Differences
In summer, water twice a day, morning and evening, to keep the substrate moist, combined with foliar spraying to cool and increase humidity. In spring and autumn, follow the "wet-dry" principle, watering when the top 2cm of soil is dry. In winter, strictly control water during the dormant period, once every 20-25 days.
1.2 Water Quality Requirements
It is recommended to use tap water that has been exposed to sunlight for 24 hours, and the water temperature should be close to room temperature. Add 0.1% ferrous sulfate to the water to adjust the pH and prevent iron deficiency yellowing of leaves.
II. Intelligent Light Adjustment
2.1 Control of Light Intensity
In spring, autumn, and winter, the plant can tolerate full sunlight, while in summer, it needs to be shaded by 30-50%. When using shade nets, ensure at least 4 hours of scattered light to prevent etiolation.
2.2 Symptoms of Abnormal Light
Strong light damage manifests as leaf tip scorching and burn spots on the leaf surface; lack of light causes new leaves to turn yellow and old leaves to become dull. It is recommended to rotate the pot 45 degrees monthly to ensure uniform light exposure.
III. Precise Fertilization Plan
3.1 Fertilizer Ratio Techniques
During the growing season (April-September), apply a balanced NPK fertilizer (20-20-20) every 15 days, with the dilution concentration strictly controlled at 800-1000 times. In winter, switch to phosphorus-potassium fertilizers to enhance cold resistance.
3.2 Emergency Treatment for Fertilizer Burn
If the leaf edges turn brown, immediately immerse the pot and rinse, changing the water three times consecutively to dilute. In severe cases, replace the substrate, prune the rotting roots, and then soak in root promoting powder before repotting.
IV. Comprehensive Disease Control
4.1 Identification of Common Diseases
Leaf spot disease initially appears as small brown dots and later expands into irregular patches; (T-J) disease produces concentric patterns; leaf blight causes the entire leaf to turn brown rapidly. Diseased leaves should be removed and isolated promptly.
4.2 Drug Use Specifications
Alternately use 70% thiophanate-methyl 800 times solution and 25% prochloraz emulsion 1500 times solution, once every 7-10 days for three consecutive times. Combine with 0.1% potassium dihydrogen phosphate foliar fertilizer to enhance disease resistance.
By establishing a four-in-one care system focusing on water, light, nutrition, and disease, along with regular observation and preventive management, the yellowing and spotting issues of the fortune tree can be effectively controlled, restoring the plant's lush vitality.