What to Do When Narcissus Leaves Turn Yellow
As a famous winter ornamental flower, the yellowing of narcissus leaves is a problem that troubles many flower enthusiasts. Yellow leaves not only affect the ornamental value but also serve as a health alert from the plant. This article will systematically analyze the five main causes of yellow leaves and provide operable solutions to help you quickly restore the narcissus to its lustrous green leaf state.
1. Environmental Control and Maintenance Tips
1.1 Dealing with Temperature Fluctuations
Low temperatures in winter are the main trigger for narcissus yellowing leaves. When the ambient temperature drops below 10°C, the root absorption function decreases, and chlorophyll synthesis is hindered. It is recommended to use a stepped warming method: maintain 15-18°C during the day and no lower than 12°C at night, and keep a 5cm safe distance when using a heating pad.
1.2 Managing Light Intensity
Narcissus is a plant that requires medium sunlight, needing 6-8 hours of scattered light daily. In winter, it can accept full sunlight, but in summer, a shading net should be used to filter 40% of the strong light. Regularly rotate the pot to ensure even exposure to light and avoid one-sided yellowing of leaves.
2. Scientific Nutrition Supply Solutions
2.1 Precise Nitrogen Supplement
During the growing period, apply a 0.02% urea solution every 10 days, and using matured soybean cake water will yield better results. For hydroponic narcissus, it is recommended to use a special hydroponic nutrient solution to avoid polluting the water with traditional soil fertilizers.
2.2 Timely Iron Intervention
Iron deficiency yellowing is characterized by the loss of green between leaf veins. You can water with a 0.05% ferrous sulfate solution monthly, and adding 2 drops of lemon juice can enhance absorption. Placing a rusted nail in the hydroponic container can slowly release iron elements.
3. Key Techniques for Daily Management
3.1 Systematic Pruning Strategy
After the flowering period each year, it is necessary to perform renewal pruning: retain 2-3 functional leaves at the base and cut off old, weak, and yellow leaves. Pruning tools need to be disinfected with alcohol, and the cut surfaces should be dusted with charcoal powder to prevent infection.
3.2 Substrate Renewal Cycle
For soil-grown narcissus, the substrate should be changed every 2 years, using a formula of peat: perlite: decomposed leaf soil = 3:1:1. When repotting, inspect the bulbs, remove the rotting parts, and then soak in a carbendazim solution for 30 minutes.
By managing temperature, light, nutrition, and pruning, combined with a 2-year repotting system, you can effectively prevent narcissus yellowing leaves. It is recommended to perform a leaf SPA monthly: wipe the leaf surface with diluted beer, which not only cleans but also supplements amino acids. Master these maintenance secrets to keep your narcissus leaves always shining with the luster of jade.