What to Do When White掌 Leaves Turn Yellow
As a star variety of indoor ornamental leaf plants, White掌 is loved for its elegant form and air-purifying function. However, the issue of yellowing leaves often troubleshoots plant enthusiasts. This article will systematically analyze the causes of White掌 yellow leaves and provide scientific remedies from four dimensions: temperature, lighting, watering and fertilizing, and soil.
Key Techniques for Temperature Control
Causes of Low Temperature Injury
When the environmental temperature drops below 10°C, the activity of White掌 cells decreases, chlorophyll synthesis is hindered, and the leaves show yellowish-brown spots on the edges. Prolonged low temperatures can cause vascular bundles to freeze, leading to whole-plant yellowing.
Intelligent Temperature Control Solutions
Maintain a growth temperature of 15-28°C in winter, using a combination of double curtains and a humidifier to maintain a microclimate. Gradually warm frozen plants, avoiding immediate placement near a heater. You can use 101 Plant Vitality Essence 500 times liquid to drench the roots for repair.
Core Points of Lighting Management
Recognition of Sunburn Damage
Direct sunlight can cause yellowish-brown sunburn spots on the leaf surface, and severe cases may lead to leaf curling. Morning dew-like crystals on the leaf surface are early warning signs of light damage.
Scientific Shading Operation Guide
Use a 30% sunshade net and place it on an east-facing windowsill. Avoid direct sunlight from 11:00 to 15:00 in the summer. Spraying seaweed sugar solution (0.1g/L) on sunburned leaves can promote repair.
Water and Fertilizer Balance Control Plan
Dry-Wet Cycle Management Standards
Water using the "soak pot" method, waiting until the top 2cm of the substrate is dry before watering. Apply a 20-20-20 NPK water-soluble fertilizer (800 times liquid) every 15 days during the growing season, and use chelated iron foliar fertilizer once a month.
Emergency Process for Rotting Roots and Yellow Leaves
If waterlogging is detected, remove the pot, prune the rotting roots, and soak in a 1000 times solution of carbendazim, then use a transition substrate of珍珠岩:蛭石 = 3:1.
Advanced Soil Improvement Strategies
Matrix Formula Golden Ratio
Recommended formula: peat soil 40% + pine bark 25% + red jade soil 20% + bamboo charcoal granules 15%. Add 5% fermented sheep manure every half year to improve the structure and maintain a slightly acidic environment with a pH of 5.5-6.5.
Timing of Potting Operation
Choose to repot around Qingming (Tomb Sweeping Day). Keep 1/3 of the protective soil. After repotting, place the plant in a diffused light area for 7 days to acclimate, and use HB101 plant activator to promote root growth.
Through systematic environmental control and precise maintenance, the yellowing leaf issue of White掌 can be effectively improved. It is recommended to establish a maintenance log, recording key data such as temperature and humidity, watering cycle, etc., and to combine regular leaf wiping (once a week) and rotating the pot (every 3 days at 90°) to keep the plant in the best condition.