What should I do if the leaves of osmanthus all fall off in winter?
Falling leaves of osmanthus flowers in winter are a common problem that troubles many flower lovers. When you find that all plant leaves fall off, there is no need to panic excessively. This is often a stress response to root damage or environmental discomfort. Through scientific and systematic first aid measures, osmanthus can be fully revitalized. Key steps for root restoration: Comprehensive inspection and pruning of roots. After removing the pot, the roots need to be gently rinsed with running water, focusing on checking the color and texture of the root tips. Healthy roots should be milky white and elastic, and black and soft rotten roots should be completely removed. When pruning, retain the main root structure, use scissors disinfected with boiling water to cut obliquely at 45°, and reduce the incision area by 30%. Root disinfection treatment points Immediately after pruning, soak in 1000-fold diluted carbendazim solution for 20 minutes, and then place in a cool place to dry the roots for 4-6 hours until the incision conjunctiva. This process needs to avoid direct strong light, and can be covered with moist gauze to maintain the humidity of the microenvironment. The optimization plan for the substrate ratio of soil improvement and pot replacement techniques uses a mixed substrate of humus soil: coarse river sand: perlite =5:3:2, and a small amount of bone meal is added to enhance air permeability. A 3cm ceramite drainage layer is laid on the bottom of the basin, and fermented pine needles are placed in the middle layer to adjust the pH value to ensure that the pH value is maintained between 5.5 and 6.5. Precautions for pot changing operations When placing pots, keep the original soil ball in close contact with the new soil, and the planting depth is 2cm deeper than the original soil mark. Root fixing water needs to be poured thoroughly in three times, with an interval of 15 minutes to allow the water to fully penetrate. Indobutyric acid can be added to the first watering to promote the germination of new roots. Plant pruning and maintenance management The golden rule of branch pruning follows the principle of "removing three and leaving seven": remove three types of bad branches, dead branches, sick branches, and cross branches, and retain 70% of healthy branches. Keep 3-5 bud points on the main branch and 2-3 bud points on the lateral branch. Apply wound healing agent immediately after pruning. Maintenance points during the rejuvenation period maintain the ambient temperature of 18-25℃ and control the air humidity at 60%-70% during the seedling period. Use the dipping pot method to replenish water, gradually increase the light after the new buds germinate, and rotate the flowerpot 45° every week to ensure uniform light reception. Two weeks after germination, organic liquid fertilizer diluted 2000 times can be applied.
Through a three-pronged approach of root restoration, soil improvement and scientific pruning, osmanthus usually resumes growth in 4-6 weeks. In winter maintenance, special attention should be paid to cold prevention and warmth. When the temperature is lower than 5 ° C, it should be moved indoors in time to keep the basin soil slightly moist and no water accumulation. The trees and flowers will be restored in the coming spring.