The Reasons and Solutions for the Yellowing Leaves of Brugmansia
Brugmansia is loved by flower enthusiasts for its velvet-like leaves and bright flowers, but yellowing leaves often occur during maintenance, affecting its ornamental value. This article will systematically analyze the three main factors leading to yellowing, from root care to environmental control, and provide professional solutions.
Diagnostic Manual for Yellowing Leaves of Brugmansia
Root Suffocation Type Yellowing Leaves
When the soil moisture content continuously exceeds 70%, the capillary roots will turn brown due to hypoxia. This can be judged by observing whether the bottom of the pot has water seepage and whether the surface moss is densely grown. It is recommended to use a soil mixture of peat soil: perlite = 3:1 and check soil moisture monthly using the bamboo stake method.
Light Imbalance Type Yellowing Leaves
Brugmansia requires 2000-3000lux scattered light to maintain chlorophyll synthesis. When maintaining on a north-facing balcony, a supplementary light can be set to shine for 4 hours a day (40cm away from the plant). Rotate the pot every 3 days by 45 degrees to avoid unilateral phototropic growth.
Malnutrition Type Yellowing Leaves
Residue from foliar fertilizer can form salt crystals that clog the stomata. It is recommended to use the immersion pot method for fertilizing, using an ornamental type nutrient solution with an EC value of 1.2-1.5mS/cm. If fertilizer damage occurs, immediately wipe the leaf surface with a cotton swab dipped in a lemon acid solution (0.5% concentration).
Systematic Maintenance Plan
Establish a periodic maintenance log, recording watering frequency, duration of sunlight, and amount of fertilization. It is recommended to use soft water with a pH of 5.5-6.0 for irrigation, combined with a layer of ceramsite for drainage. Use a 1000-fold solution of carbendazim monthly for substrate disinfection to prevent physiological yellowing leaves caused by Fusarium.
By adjusting the cultivation substrate, optimizing the light environment, and standardizing the fertilization process, the yellowing leaf problem of Brugmansia can be effectively controlled. It is recommended to perform a root examination every quarter, trim aging roots in a timely manner, and maintain the plant's vigorous vitality.