How to Care for Rieger Begonias in Winter
As a representative of tropical flowers, Rieger begonias are favored for their vibrant colors. How to keep this delicate plant safe during the cold winter? Is it possible to propagate by cutting in winter? This article will delve into the essentials of care and precautions for cutting.
Five Key Points for Winter Care of Rieger Begonias
Temperature Control Strategy
Maintaining a constant temperature of 15-20°C is crucial for overwintering, with the minimum night temperature not falling below 12°C. It is recommended to use heating mats in the north and avoid areas directly hit by air conditioning in the south.
Light Management Techniques
Ensure 4-6 hours of scattered light daily and rotate the pot to ensure even exposure. On cloudy or rainy days, supplement with LED plant grow lights to maintain a light intensity of 2000-3000 lux.
Scientific Water and Fertilizer Management
Use the "dry-wet" watering method and pour water slowly along the pot wall with a long-spout壶. Stop applying nitrogen fertilizer in winter and supplement with potassium dihydrogen phosphate (0.1% concentration) once a month to enhance cold resistance.
Humidity Balance Plan
Maintain 50-60% air humidity using a humidifier or pebble water tray. Be aware that leaf积水 can trigger gray mold, so ventilate for 2 hours after watering.
Feasibility Analysis of Winter Cutting
Selection of Cutting Time
While it is theoretically possible to cut in winter, it is recommended to prioritize spring and autumn. If it is necessary to operate in winter, ensure a stable environmental temperature above 18°C.
Key Points for Substrate Preparation
Use a mixture of perlite, vermiculite, and peat soil in a ratio of 1:1:2, and sterilize at high temperature before use. Choose semi-woody branches for cuttings, retaining 2-3 leaf nodes.
Post-Cutting Care Management
After cutting, cover with a transparent humidity dome and ventilate for 30 minutes daily. Gradually increase light after 3 weeks and transplant after new buds emerge. The survival rate is about 40% lower than in spring and autumn.
By precisely controlling temperature, light, and humidity, combined with scientific water and fertilizer management, it is entirely possible to ensure the safe overwintering of Rieger begonias. While winter cutting is challenging, mastering the core techniques can still be attempted. It is recommended for新手 gardeners to prioritize basic care first and then proceed with propagation operations in spring.