What Causes the Dry Leaves of Brugmansia?
Brugmansia is beloved by gardeners for its velvet-like leaves and vibrant flowers, but it often encounters leaf drying issues during maintenance. This article will systematically analyze the three core factors leading to dry leaves in Brugmansia through specific case illustrations, and provide scientific treatment solutions to help you quickly diagnose abnormal plant conditions.
Main Reasons for Brugmansia Leaf Drying
Imbalance in Nutrient Supply
As a fertilizer-loving plant, Brugmansia requires continuous nutrient supply during its growing season (March to September). Experimental data shows that when the soil EC value is less than 1.2mS/cm, the plant will exhibit yellow leaves due to nutrient deficiency. It is recommended to apply a diluted phosphorus-potassium liquid fertilizer every 10 days, combined with a monthly application of decomposed soybean cake fertilizer to supplement trace elements.
Drastic Temperature Fluctuations
When the temperature drops below 15°C, the root activity of Brugmansia decreases by more than 60%. Special attention is needed in northern winters, with a recommended double-layer insulation measure: an outer layer of transparent insulation bags and an inner layer of 5cm thick pine bark mulch, maintaining a day-night temperature difference of less than 8°C. In the southern plum rain season, it is necessary to enhance ventilation to prevent root rot due to high humidity.
Improper Water Management
By monitoring with a soil moisture meter, when the water content at 3cm of the topsoil is less than 30%, water should be added promptly. The immersion pot method of watering is more beneficial for root absorption, and each watering should ensure that water seeps from the bottom drainage hole. During high summer temperatures, combine with foliar spraying to maintain an air humidity of 65%-75%.
Advanced Maintenance Techniques
Light Control Plan
In spring and autumn, receive scattered light for 4-6 hours/day, and use a 50% shade net in summer. The recommended light intensity is maintained at 8000-12000Lux, which can be monitored in real-time with a mobile phone light measurement app. Regularly rotate the pot to ensure uniform light exposure and prevent one-sided leaf drying.
Disease Prevention System
Establish a monthly preventive fungicide application system, alternating between carbendazim and mancozeb. When the initial symptoms of leaf spot disease are detected, immediately remove the diseased leaves and spray the entire plant with a 3000-fold solution of pyraclostrobin, repeating the treatment three times (with a 5-day interval).
Through a three-dimensional maintenance system of scientific fertilization, precise temperature control, and reasonable watering, combined with pest and disease prevention measures, the issue of Brugmansia dry leaves can be effectively avoided. It is recommended to keep a maintenance log, recording each fertilization and watering time and the plant's response, gradually mastering the personalized maintenance rhythm.