What should I do if the leaves of Guanyin turn yellow when dripping water?
As a star species among tropical leaf-viewing plants, Dishui Guanyin is very popular for its unique leaf shape and ability to purify the air. However, yellowing of leaves often occurs during the maintenance process, which directly affects the ornamental value of the plants. This paper will systematically analyze the causes of yellow leaves and provide professional solutions from three dimensions: environmental regulation, water management, and nutrient supply. 1. Ambient temperature control 1.1 Temperature sensitivity characteristics Dishui Guanyin, native to tropical rainforests, is extremely sensitive to temperature, and 18-28℃ is its optimal growth range. When the ambient temperature is lower than 15℃, the absorption capacity of the roots decreases and chlorophyll synthesis is blocked, causing the old leaves to turn yellow first and then spread to new leaves. 1.2 The temperature control plan should move the plants to the indoor southward window in winter, and use double insulation films to build a temporary greenhouse. It is recommended to configure an electronic thermohygrometer for real-time monitoring. When the night temperature is lower than 12℃, turn on the heating pad to keep the substrate temperature stable at 20℃±2℃. 2. Scientific water management 2.1 Dry and wet cycle mechanism Dripping Guanyin's fleshy roots are both afraid of water and drought, and follow the principle of "seeing dry, seeing wet". When the surface soil is 3cm dry, water should be replenished immediately, and the dipping basin method should be used to allow water to slowly penetrate from the bottom to avoid rot caused by accumulated water in leaf sheaths. 2.2 Abnormal treatment plan: Yellow leaves with accumulated water need to be removed immediately to check the root system. After pruning the black and rotten roots, soak them with carbendazim for 20 minutes. Replace the breathable substrate (coconut bran: perlite =3:1) and place it in a ventilated and scattered light place to slow down the seedlings. Drought-stricken yellow leaves should be replenished gradually in three times to avoid sudden water impacts on the roots. 3. Precise nutrient supply 3.1 Fertilization cycle: apply water-soluble fertilizers with balanced nitrogen, phosphorus and potassium (EC value 1.2-1.5mS/cm) every 15 days during the growth control period (April to October), and stop fertilization during the winter dormant period. Pay special attention to avoid using undecomposed organic fertilizers, as the heat generated during the fermentation process will burn the roots. 3.2 Emergency treatment of fertilizer hazards After a fertilizer hazard occurs, the substrate needs to be continuously washed with clear water 3-5 times to cut off damaged leaves to reduce nutrient consumption. During the recovery period, foliar fertilizer was supplemented with a combination of alginate + brassinolide, and the concentration was controlled at 800-1000 times liquid.
Through three-dimensional control of temperature, moisture, and nutrients, and regular inspection of leaf backs to prevent pests such as red spiders, the problem of dripping Guanyin yellow leaves can be effectively solved. It is recommended to use HB-101 plant vital element every quarter to enhance stress resistance and keep the plants in a shiny and green ornamental state.