What to Do When the Leaves of the Calla Lily Turn Yellow
As a representative indoor foliage plant, the issue of yellowing leaves in calla lilies困扰s many gardening enthusiasts. This article systematically analyzes 7 major maintenance misconceptions, and through scientific diagnosis and precise adjustment, it will help your calla lily regain its lush green vitality.
Three Core Points of Water Management
Accurate Control of Watering Amount
A moist environment is essential for the growth of calla lilies, but waterlogging can cause root asphyxia. It is recommended to use the immersion method: place the pot in a container with water, remove it immediately after the surface soil is moist, ensuring uniform water penetration.
Regulation of Air Humidity
Equip a thermometer and hygrometer for real-time monitoring. When humidity is below 60%, use a misting humidifier or water tray evaporation method. Avoid spraying water directly onto the leaf center to prevent soft rot disease.
Balanced Nutrition Supply Plan
Fertilizing Schedule and Ratio
In the growing season (March-September), apply a balanced liquid fertilizer (EC value 1.2-1.5mS/cm) every 10 days, and during the flowering period, add phosphorus and potassium fertilizer (0.1% concentration). Stop fertilizing during the winter dormancy period.
Organic Fertilizer Improvement Plan
When repotting each year, mix in decomposed sheep dung (15% ratio), and combine with bone meal to supplement calcium. In case of fertilizer damage, rinse the substrate with water three times immediately, prune the burned roots, and replace with new soil.
Precise Control of Environmental Factors
Temperature Gradient Management
Establish a day-night temperature difference mechanism: 22-25°C during the day and 16-18°C at night. Use double-layer insulation in winter, with an outer layer of pot filled with foam particles and an inner layer of pot bottom padded with a heating pad (keeping above 15°C).
Air Purification Measures
Place an air purifier in areas with pollution sources such as the kitchen, choosing models with a CADR value ≥150m³/h. Regularly wipe the leaf surface with a damp cloth, and clean the leaf surface monthly with diluted beer solution (1:20).
By establishing a maintenance log, record daily temperature and humidity, watering frequency, and other data, and adjust dynamically based on the plant's growth state. It is recommended to use smart pots to monitor soil EC values and water content in real-time, achieving precise maintenance.