What should I do if the banyan leaves turn yellow?
As a representative of tropical leaf-viewing plants, the bright green leaves of banyan trees are a sign of their healthy growth. However, yellowing of leaves often occurs during maintenance, which not only affects the ornamental value, but may also imply a plant health crisis. Mastering the correct yellow leaf handling skills can bring your banyan tree back to life. Causes and solutions for yellow leaves Scientific water management Improper watering is the primary cause of yellow leaves in banyan trees. Excessive watering leads to hypoxia and rot in the roots, which is manifested by yellowing and wilting of new leaves; lack of water will cause the edges of old leaves to become yellow and curled. It is recommended to use the "dipping basin method" for watering, and wait until the surface of the basin soil is 2 cm dry before pouring thoroughly. Keep it 2-3 times a week in spring and autumn, and increase it to replenish water every morning in summer. Nutritional imbalance in the supply of precise nutrients can trigger a chain reaction of yellow leaves: new leaves turn yellow when nitrogen is deficient, and iron is deficient when veins become yellow. It is recommended to use slow-release fertilizer with N-P-K=10-6-4, and apply 15-20 grains every quarter. If yellow leaves appear, you can spray them with 0.2% ferrous sulfate solution once a week for 3 consecutive weeks. Pay attention to the need to loosen the soil in time after fertilization to promote nutrient absorption. Root health maintenance The problem of rotten roots needs to be dealt with in stages: for minor symptoms, water can be stopped and loosened soil and ventilation should be strengthened; for serious cases, the pot needs to be removed and roots repaired. Use disinfectant scissors to cut off the browned root system and retain healthy white roots. Apply charcoal powder to the wound and replace it with a new substrate with 30% perlite. Avoid applying fertilizer for 2 weeks after pruning and resume maintenance until new roots germinate. The pest and disease control system can physically remove scale insects with 75% alcohol cotton swabs, and red spiders need to alternately use pyridaben and avermectin. In the early stage of leaf spot disease, 800 times of mancozeb solution was sprayed, and (T-J) the disease was controlled with difenoconazole. It is recommended to wipe the back of the leaves with garlic extract (1:20) every month to establish a natural protective barrier.
Through the above systematic treatment plan, combined with regular pelvic rotation (90° rotation every half month) and air humidity control (maintained at 60%-70%), more than 90% of yellow leaf problems can be effectively improved. Remember that prevention is better than treatment. Establishing a maintenance log to record water and fertilizer management can keep your banyan tree healthy leaf color like jade all year round.