Reasons for Yellowing Leaves Underneath Large-Leaf Green萝
Large-leaf Green萝, as a common indoor ornamental plant, has many growers troubled by the yellowing of the lower leaves. This phenomenon not only affects the ornamental value but may also indicate potential health issues in the plant. This article deeply analyzes the causes of yellow leaves from four dimensions and provides actionable solutions to help you create a lush indoor landscape.
One: Water Imbalance Leading to Yellow Leaves
1.1 Identifying Symptoms of Water Deficiency
The yellowing and drying of the edges of old leaves are typical signs of water deficiency, at which point the plant will prioritize the supply of limited water to the top new leaves. By observing soil moisture, you can accurately judge: if the top 3cm of soil is dry, it is time to water.
1.2 Scientific Watering Plan
In spring and summer, keep the soil moist but not waterlogged, watering thoroughly every 5-7 days; in winter, extend it to every 10-15 days. It is recommended to use the immersion pot method: soak the pot in a basin of water for 20 minutes to ensure that the roots absorb water fully.
Two: Mismanagement of Light
2.1 Analysis of Light Environment Needs
Although it is a shade-tolerant plant, complete darkness can impede the synthesis of chlorophyll. Ensure 2-3 hours of scattered light daily, avoiding direct strong light that can burn the leaves.
2.2 Techniques for Adjusting Light
It can be placed 1.5 meters away from an east-facing windowsill, or use a curtain with 30% light blocking to filter strong light. Regularly rotate the pot to ensure even light exposure on all sides and prevent one-sided yellowing of leaves.
Three: Imbalance in Nutrient Supply
3.1 Identifying Symptoms of Fertilizer Damage
Excessive fertilization is manifested by the browning and crystallization at the tips of old leaves. Excessive nitrogen results in the yellowing of leaf veins, while an excess of phosphorus and potassium causes leaf edges to curl.
3.2 Scientific Fertilizing Plan
Apply a diluted 1000-fold specialized fertilizer for ornamental plants every month during the growing season, and stop fertilizing in winter. When fertilizer damage occurs, rinse the potting soil with water three times in a row and cut off the damaged leaves.
Four: Handling Physiological Yellowing of Leaves
4.1 Judging Metabolism
The natural shedding of a single yellow leaf at the bottom is a normal phenomenon, usually accompanied by the sprouting of new buds. If the number of yellow leaves is less than 5% of the total and there is no sign of spreading, no special treatment is needed.
4.2 Key Points for Pruning and Maintenance
Use scissors disinfected with alcohol to cut obliquely along the base of the petiole, and after cutting, spray with carbendazim to prevent infection. Retaining healthy aerial roots can promote the sprouting of new leaves.
Through systematic analysis, it can be seen that the yellowing of large-leaf Green萝 leaves requires a combination of environmental regulation and meticulous management. It is recommended to establish a maintenance log, recording watering, lighting, and fertilizing data to gradually master the growth patterns of the plant. Regularly cleaning the leaf surface with a damp cloth can not only improve photosynthetic efficiency but also detect potential pest and disease risks early.