Why Do the Leaves of Epipremnum Aureum Turn Yellow?
Epipremnum aureum, a common indoor ornamental plant, often causes concern among caregivers when its leaves suddenly turn yellow. Yellowing leaves are not only a distress signal from the plant but also indicate a deviation in the care routine. By systematically analyzing common causes and taking targeted measures, Epipremnum aureum can be restored to its healthy state.
I. Water Imbalance Leading to Yellowing Leaves
1.1 Misunderstandings About Watering Frequency
In summer, it is necessary to keep the soil slightly moist, while in winter, water should be controlled to keep the surface dry. Use the finger test: water when the second knuckle inserted into the soil feels dry, avoiding waterlogging and root rot.
1.2 Adjusting Air Humidity
In northern winters, a humidifier can be used to maintain 40%-60% humidity, or pebbles can be placed in a tray with water to create a microclimate, supplemented by 2-3 times of foliar spraying per week.
II. Nutritional Imbalance Causing Leaf Lesions
2.1 Identifying Deficiency Symptoms
New leaves turning yellow with deep green veins indicate iron deficiency, while older leaves turning yellow are often due to insufficient nitrogen and phosphorus. It is recommended to use N-P-K 20-20-20 water-soluble fertilizer, diluted and watered once a month in spring and autumn.
2.2 Emergency Treatment for Fertilizer Burn
If excessive fertilization occurs, immediately flush the potting soil with water three times, cut off the charred roots, disinfect with carbendazim, and replace with a new mix of peat and perlite.
III. Sudden Environmental Changes Causing Physiological Disorders
3.1 Management During Temperature-Sensitive Periods
Keep the temperature above 15°C in winter and avoid direct cold wind. In summer, when temperatures exceed 30°C, enhance ventilation and use a water curtain cooling system to maintain the optimal temperature of 25°C.
3.2 Adaptation Strategy for Light Exposure
Newly purchased plants should undergo a 7-day shading transition, using a shading rate of 50%-70% to gradually increase light exposure. The east-facing windowsill is the best location, receiving soft morning light.
By adjusting the water and fertilizer ratio, improving environmental parameters, and establishing a systematic care plan, new leaves can usually be seen sprouting within 2-3 weeks. Regularly cleaning the leaf surface with alcohol wipes and rotating the pot to ensure even light exposure can help keep Epipremnum aureum in the best ornamental state.