What to Do When海棠 Flower Leaves Turn Yellow
As a traditional famous flower in China,海棠 flowers are deeply loved for their beautiful and captivating appearance. However, yellowing of leaves often occurs during the maintenance process, which not only affects the ornamental value but may also indicate health issues in the plant. This article systematically analyzes the causes of yellow leaves in海棠 flowers and corresponding solutions from four dimensions: water management, light control, nutrient supply, and temperature adjustment.
Water Management: Scientific Watering to Protect Roots
Characteristics of Root Rot from Waterlogging
Long-term soil moisture can lead to difficulty in root breathing, causing old leaves to turn yellow and fall from the bottom up, and in severe cases, water-stained spots appear at the base of the stem. Immediate cessation of watering is required, and use bamboo sticks to poke holes in the potting soil for aeration.
Manifestations of Drought and Dehydration
New leaves curl and wilt, accompanied by dry old leaves, and obvious cracks appear on the soil surface. The immersion pot method should be used to replenish water, ensuring each watering penetrates to the bottom of the pot.
Light Control: Balanced Light and Shadow for Growth
As a short-day plant,海棠 requires 4-6 hours of scattered light daily. It can accept full sunlight in spring and autumn, needs shade netting to filter strong light in summer, and should be placed near a south-facing window in winter. Insufficient light causes leaves to appear evenly light yellow, which can be corrected by gradually increasing light intensity.
Nutrient Supply: Precise Fertilization to Control Yellowing
Remedial Plan for Fertilizer Damage
New leaves becoming thick and wrinkled, and leaf edges becoming burnt are typical symptoms of fertilizer damage. You can rinse the potting soil with clean water three times in a row, combined with applying EM bacterial solution to repair the soil environment.
Diagnostic Guide for Deficiency Symptoms
Lack of nitrogen causes lower leaves to turn yellow, while insufficient iron results in the loss of green between the veins of new leaves. It is recommended to apply a compound slow-release fertilizer containing trace elements once a month, with the concentration controlled between 0.1% and 0.2%.
Temperature and Humidity Management: Creating an Environment to Prevent Burnt Edges
Maintain an ideal temperature range of 15-25°C and keep the air humidity at 60%-70%. Use a humidifier when the temperature exceeds 32°C in summer and use insulation bags when it drops below 10°C in winter. Keep the day-night temperature difference within 8°C to avoid burnt yellow spots on the leaf edges.
By regularly observing changes in leaf color and adjusting maintenance strategies according to seasonal characteristics, combined with diagram-based diagnostic methods for timely intervention,海棠 flowers can be restored to their healthy, lush green state. It is recommended to conduct root checks every quarter, using slightly acidic soil with a pH of 5.5-6.5 to fundamentally prevent yellowing leaves.