Pearl String Orchid Yellow Leaf Causes and Solutions
The Pearl String Orchid is loved for its jade-like round leaves and hanging beauty, but yellowing leaves often plague growers during maintenance. This article deeply analyzes the four main causes of this phenomenon and provides actionable solutions to help you restore the lush green cascade of the orchid.
One: Improper Potting Soil Maintenance Causes Yellow Leaves
Root Growth受限
The fleshy roots of the Pearl String Orchid are only 5-8cm deep, and deeper pots can easily cause waterlogging and root rot. It is recommended to choose a breathable red pottery pot with a depth of 12cm or less, with a 3cm thick layer of ceramic stones for drainage at the bottom of the pot.
Soil Mixture Imbalance
The ideal matrix should contain 40% decomposed leaf soil + 30% coarse river sand + 20% pearl rock + 10% bone meal. The soil needs to be replaced every 2 years, and retaining 1/3 of the original soil when repotting can reduce stress reactions.
Two: Three Misunderstandings in Water Management
Features of Drought-Induced Yellow Leaves
The leaves turn yellow and shrink from the bottom up, feeling brittle to the touch. At this point, soak the pot in water for 2 hours, then maintain a matrix moisture level of about 40%, with recommended air humidity between 60%-70%.
Scientific Watering Schedule
Spring and autumn: 5-7 days/week, summer: 3-4 days/week (avoiding noon), winter: 15-20 days/week. Use a long-spouted pot to water slowly along the edge of the pot, avoiding water accumulation in the leaf heart.
Three: Key Points for Light Regulation
Light Damage Repair Plan
Strong light burn is manifested as brown sunburn spots on the leaves, which require immediate relocation to 1.5 meters away from the east window. During the recovery period, spray a维生素B1 solution (1:1000) twice a day, for 3 consecutive days.
Ideal Lighting Environment
Receive 4 hours of soft diffused light daily, and use a shading net to adjust (50% shading in summer, 30% in spring and autumn). Rotate the pot 180 degrees regularly to ensure even light exposure.
Four: Nutritional Supplement Strategies
Deficiency Diagnosis Guide
Nitrogen deficiency: New leaves turn yellow; Iron deficiency: Loss of green between leaf veins; Potassium deficiency: Leaf edges turn brown. It is recommended to apply a foliage plant special fertilizer (N-P-K=20-10-10) monthly.
Foliar Fertilizer Application Skills
Dilute monopotassium phosphate to a concentration of 0.2%, and spray in the morning 9-10 am on cloudy days, focusing on the back of the leaves. After fertilizing, enhance ventilation to avoid fertilizer residue.
By systematically adjusting the maintenance methods, new green growth can usually be seen in 2-3 weeks. It is recommended to establish a maintenance log, recording data such as temperature and humidity, and fertilizing cycles, to gradually form a personalized maintenance plan. When the yellow leaf rate exceeds 60%, you can take cuttings to ensure the continuation of the plant.