Reasons and Solutions for Chlorosis in Clivia Miniata
As a popular indoor foliage plant, the yellowing of Clivia Miniata leaves is a common problem that troubles many gardening enthusiasts. This article focuses on the three main causes of chlorosis in Clivia Miniata, combined with over 20 years of gardening experience, to systematically analyze the symptom characteristics and scientific treatment methods.
I. Root Damage Causing Chlorosis
1.1 Hazards of Overwatering
The succulent roots of Clivia Miniata have strong water storage capacity, and waterlogging can lead to respiratory difficulties in the roots. Water when the soil below the surface is dry to 3cm, and use breathable containers like terracotta pots to prevent waterlogging effectively. Reduce watering by 50% during the summer high-temperature dormancy period.
1.2 Emergency Steps for Root Rot
Immediately remove the plant from the pot and inspect after yellowing is observed, retaining the healthy white roots and cutting off the black rot parts. It is recommended to apply wood ash to the cut and change to a mixed substrate of pine bark: perlite in a 7:3 ratio, and place it in a well-ventilated area to recover for 2 weeks.
II. Improper Light Management
2.1 Characteristics of Sunburn Damage
Yellowish-brown spots on the leaves are usually caused by excessive light. In spring and autumn, the plant can receive 2 hours of direct sunlight in the morning and evening, and in summer, a shading net with 60% shading is needed. A north-facing windowsill is the best location, maintaining a light intensity of 20,000-30,000 lux.
2.2 Shading Maintenance Tips
Yellowed leaves should be trimmed promptly, retaining healthy tissue. Use double-layer gauze curtains to adjust the light and rotate the pot to ensure even exposure. In winter, increase to 4 hours of direct sunlight to promote photosynthesis.
III. Remedies for Over-fertilization
3.1 Methods to Identify Fertilizer Damage
Yellowing and curling of the leaf tips, and white crystals appearing on the surface of the potting soil are typical symptoms of fertilizer damage. During the growing season, apply a balanced nitrogen-phosphorus-potassium fertilizer diluted 2000 times monthly, and completely stop fertilizing in winter.
3.2 Soil Repair Plan
Use the immersion pot method to rinse the substrate 3 times continuously, soaking for 20 minutes each time. Add 5% activated carbon when repotting to absorb residual fertilizers. During the recovery period, spray 0.1% potassium dihydrogen phosphate on the leaves to supplement nutrition.
By scientifically diagnosing the causes of yellow leaves, taking targeted measures, and combined with daily meticulous management, your Clivia Miniata will surely return to its elegant, green, and upright posture. It is recommended to perform a root health check monthly and keep a maintenance log to record growth changes.