How to Fertilize Orchids in Winter
In the cold winter season, orchid care faces many challenges, and fertilization management is a crucial aspect. Many orchid enthusiasts are困惑 about whether to fertilize in winter and how to properly supplement nutrients. This article will systematically analyze the three core elements of fertilizing orchids in winter, helping you master scientific care methods.
The Three Golden Rules for Fertilizing Orchids in Winter
Temperature Determines Fertilization Feasibility
Whether to fertilize orchids in winter depends on the ambient temperature: when the temperature continuously drops below 15°C, the plant enters a dormant period, and fertilization should be completely stopped; if greenhouse care maintains a constant temperature of 18-25°C, normal fertilization frequency can be maintained. Special attention should be paid to keeping the day-night temperature difference within 8°C to avoid sudden temperature changes affecting nutrient absorption.
Fertilizer Ratio and Application Method
It is recommended to use a 1:1500 dilution of soybean cake water or orchid-specific slow-release fertilizer, applied once a month for root irrigation. Combined with a 0.1% potassium dihydrogen phosphate solution for foliar spray, once every 15 days. Liquid fertilizers should be left to stand for 24 hours to eliminate chlorine before use, and solid fertilizers should be buried at the edge of the potting soil to avoid contact with the roots.
Special Case Handling Solutions
① newly repotted plants should stop fertilizing for 60 days ② stop fertilizing immediately if there is burning tip or yellow leaves ③ use seaweed extract instead of traditional fertilizers for weak seedlings ④ use granular bone meal in wet and cold southern regions ⑤ use water moss growing medium combined with microbial fertilizer. After fertilizing, maintain ventilation for 3 hours to prevent fertilizer solution from remaining in the leaf heart.
By monitoring temperature, precisely matching fertilizers, and flexibly adjusting care strategies, orchids can continue to accumulate nutrients in winter. It is recommended to test the potting soil EC value (controlled between 0.8-1.2mS/cm) monthly and dynamically adjust the plan based on the plant's condition, laying a solid foundation for spring sprouting.