Reasons for the drying and cracking of large-leaf green pothos leaves
As a popular choice for indoor ornamental foliage plants, large-leaf green pothos is loved for its wide, glossy leaves. However, it often experiences leaf drying and cracking during maintenance, which directly affects its ornamental value. This article systematically analyzes the causes and solutions of leaf drying and cracking from three dimensions: water management, environmental control, and nutritional supplementation.
Water imbalance causes green pothos leaf cracking
Inadequate root water supply
When the soil moisture content is less than 30%, the plant reduces transpiration by closing the stomata, leading to dehydration of leaf flesh cells and forming dry spots. It is recommended to use the "soak pot method" to replenish water: place the pot in a water-filled basin for 20 minutes, then drain the excess water after the substrate has fully absorbed the water to avoid waterlogging and root rot.
Imbalance in air humidity
During winter heating, humidity is often below 40%. This can be improved by using the "sandwich humidification method": place a layer of pebbles in a tray, pour water into the pebbles to half their height, then place the pot on the pebble layer. Combine this with twice-daily foliar spraying (atomized particles ≤0.3mm) to maintain an environmental humidity of 60%-70%.
Nutrient deficiency leads to abnormal leaf surfaces
In addition to the conventional root application of slow-release fertilizers, foliar top dressing should be performed every 15 days during the growing season (April-September). It is recommended to use a liquid fertilizer containing nitrogen, phosphorus, potassium, and trace elements (diluted at a ratio of 1:800), combined with a 0.1% ferrous sulfate solution to prevent chlorosis. When applying, focus on covering the areas with dense stomata on the leaf back to enhance absorption efficiency.
Sudden environmental changes cause stress responses
Sudden temperature changes (daily temperature difference > 8°C) or direct strong light (light intensity > 8000 LUX) can cause the rupture of the leaf cuticle. It is recommended to set up a shading net (shading rate 40%-50%), keep the plant more than 1.5 meters away from radiators in winter, and maintain a constant temperature of 18-28°C.
By establishing a scientific water and fertilizer management system and an environmental monitoring system, combined with regular foliar cleaning (wiping with a diluted beer solution monthly), the luster of the leaves can be effectively restored. It is recommended to purchase a soil moisture meter and an environmental monitor to achieve precise care.