How to spend the winter potted lilac flowers
As a garden plant with both ornamental value and cold-resistant characteristics, the winter maintenance of potted lilac flowers directly affects the flower bud differentiation in the coming year. This paper systematically analyzes the key points of overwintering management of clove, and provides scientific explanations for the defoliation phenomenon that flower friends are most concerned about. Five cores of potted lilac flower maintenance in winter 1. There are significant differences in temperature gradient control strategies between north and south regions: outdoor maintenance in sunny and leeward areas is recommended for areas south of the Yangtze River, and indoor environment>5℃ needs to be moved to the north of the Yellow River Basin. Special varieties such as Baomingxiang can tolerate low temperatures of-25℃, but the cold tolerance of potted roots is 30%-40% weaker than that of local cultivation. 2. The key points of photoperiod management are to ensure direct light for ≥4 hours every day, and use sunlight to increase the temperature of the basin soil by 3-5℃. The north-facing window sill needs to be coordinated with a fill light to maintain the illuminance of 2000-3000lux to avoid excessive branches. 3. The technical indicators for moisture control follow the principle of "seeing dry, seeing wet", and the watering cycle in winter is extended to 15-20 days per time. Use a plug-in moisture meter to monitor, and maintain the substrate moisture content in the range of 18%-22% to avoid root rot caused by low temperature and high humidity. 4. Nutritional management plan applies phosphorus and potassium fertilizers (N-P-K=5-10-15) 45 days before winter to enhance stress resistance, and completely stop fertilization in winter. It is recommended to use slow-release fertilizer grains for potted plants, with 20-30 grains buried in topsoil per pot. 5. Timing and method of pruning, carry out reshaping and pruning 2 weeks after falling leaves, remove dead and weak branches and cross branches, and retain 3-5 main branches. The pruning opening is 0.5cm away from the bud point and forms a 45° angle, and apply Yushang ointment to prevent frostbite. Analysis of the mechanism of deciduous leaves in winter As a deciduous shrub, it is normal for potted cloves to retain 20%-30% of their leaves in winter. Continuous falling leaves may indicate: ① The temperature difference between day and night is>15℃; ② The air humidity is <40%; ③ The rhizosphere temperature is <3℃. It is recommended to improve it by means of basin insulation and spray humidification.
Mastering scientific overwintering management techniques and coordinating with environmental parameter monitoring can ensure that the safe overwintering rate of potted cloves reaches more than 95%. It is recommended to check the color of the phloem of branches regularly. A healthy light green indicates that the plant is in good condition and lays the foundation for spring germination.