How to Save the Yellowing Leaves of Baiyu Zan
As a common ornamental plant in gardens, Baiyu Zan is loved for its elegant leaf shape. However, yellowing leaves often reflect neglect in the maintenance process. This article systematically analyzes the causes of yellow leaves and revival techniques through four core treatment dimensions to help you quickly restore the vitality of the plant.
One: Soil Improvement Project
1.1 Soil Testing Standards
The root system of Baiyu Zan is sensitive to waterlogging with a sensitivity of 92%, requiring a matrix with a porosity >30%. A golden ratio of decomposed leaf soil: river sand: perlite = 5:3:2 can ensure that the drainage is up to standard while maintaining appropriate water retention.
1.2 Potting Operation Specifications
The best potting period is before the early spring germination, retaining 1/3 of the protective soil. The new pot should be 5-8 cm wider in diameter than the original pot, with a 3cm layer of ceramic stones at the bottom. Adding HB101 vitality essence (1:2000) to the water when watering after changing the soil can increase the rate of adaptation.
Two: Water Management System
2.1 Quantitative Watering Indicators
Keep the soil moisture between 40%-60% in spring and autumn, and increase it to 60%-70% in summer. You can use a soil moisture meter for precise monitoring, and water when the top 2cm of the soil is dry. Especially during the budding period (June-July), it is necessary to ensure continuous water supply.
2.2 Emergency Response Plan
For yellowing leaves due to waterlogging, immediately stop watering and make 10-15 breathable holes in the potting soil with a bamboo skewer. Combine with a drench of Melody 3000 times solution to prevent the spread of root rot. For drought-induced yellowing leaves, use the immersion pot method to add water, adding brassinolide to the water to promote cell repair.
Three: Light Control Strategy
3.1 Light Intensity Management
The light compensation point for Baiyu Zan is only 800 lux, requiring the use of shade nets (75% shading rate) in the summer for double protection. Ensure 2 hours of scattered light in the morning and evening, avoiding complete darkness that can lead to the cessation of photosynthesis.
3.2 Special Scenario Maintenance
For balcony planting, install a UVB filter film (wavelength 280-315nm blocking rate ≥90%). For ground planting, it is recommended to form an east-facing planting combination with trees like crape myrtle and hibiscus, using the natural shade of the tree canopy.
Four: Nutrient Supply Plan
4.1 Fertilizer Selection Standards
Choose a slow-release fertilizer with N-P-K=10-15-10, with an application rate of 50-80g per square meter. During the growing season from April to June, combine foliar spraying of chelated iron (Fe-EDDHA) with a concentration of 0.05%.
4.2 Fertilizer Damage Repair Measures
After fertilizer damage occurs, immediately perform three consecutive leachings: use 30°C clear water to thoroughly water the potting soil, with an 8-hour interval between operations. During the repair period, use kelp extract (5ml/liter) every week for drenching, continuing for 3 weeks to rebuild the rhizosphere microecology.
Through systematic diagnosis and precise intervention, the yellowing leaves of Baiyu Zan can usually show significant improvement in 2-3 weeks. The key is to establish a preventive maintenance calendar, regularly test the soil EC value (maintaining 0.8-1.2mS/cm), and record growth logs, converting treatment experience into a long-term maintenance mechanism.