What Causes the Ficus Lyrata Leaves to Turn Yellow in Autumn
As the weather cools down, many plant enthusiasts notice that their Ficus Lyrata plants are developing yellow leaves. As a foliage plant that symbolizes wealth, maintaining the greenness of the leaves is key to proper care. This article will systematically analyze the three main causes of yellow leaves in Ficus Lyrata during autumn and provide corresponding scientific rescue solutions to help you quickly restore the plant's healthy state.
Improper Fertilization Management in Autumn
Typical Symptoms of Nutrient Deficiency
Autumn is the second peak growth period of the year for Ficus Lyrata, with an increased demand for nitrogen, phosphorus, and potassium by 30%. Plants that have not been repotted for a long time are prone to substrate compaction, leading to root absorption difficulties. It is recommended to supplement with a diluted foliage plant-specific liquid fertilizer twice a month and to use slow-release fertilizer pellets every quarter.
Scientific Fertilization Techniques
Soil should be loosened and ventilated before fertilizing, and fertilizing should be avoided during high-temperature periods. New plants should be allowed to acclimate for 15 days before starting the fertilization process, and fertilization should be stopped when temperatures drop below 15°C in winter.
Comprehensive Pest and Disease Control
Identification of Common Diseases and Pests
The temperature difference between day and night in autumn can trigger leaf spot disease, which is characterized by brown circular spots on the leaves. Red spider mites often cause white speckled molts on the undersides of leaves, while scale insects form waxy bumps. It is recommended to wipe the undersides of leaves with alcohol-soaked cotton pads weekly to prevent pest infestations.
Graduated Treatment Plan
In the early stages of disease, remove the affected leaves and spray with Mancozeb solution. For minor pest infestations, neem oil can be used for physical control, while severe infections require systemic insecticides like Imidacloprid. Be sure to alternate insecticides to avoid resistance.
Temperature Regulation Strategies
Cold Damage Protection Mechanism
When the environmental temperature drops below 12°C, Ficus Lyrata will initiate a self-protection mechanism by reducing nutrient consumption through yellowing leaves. In northern regions, plants should be moved indoors before the first frost, maintaining a day-night temperature difference of less than 8°C. The pot can be wrapped in cotton cloth to enhance the roots' cold resistance.
Post-Freezing Repair Process
Plants affected by frost should be gradually warmed up, avoiding direct placement near heating sources. After pruning the yellow leaves, apply a 2000-fold solution of brassinolide to the roots to promote the growth of new buds. Maintain 60% humidity during the repair period to avoid secondary damage.
By accurately diagnosing the causes of yellow leaves and taking corresponding measures, along with regular potting and leaf cleaning as part of routine care, your Ficus Lyrata will certainly regain its lustrous green appearance. It is recommended to conduct a comprehensive check-up every quarter, addressing issues early to keep your wealth-attracting plant vibrant and healthy.