What happened to the drooping osmanthus leaves
As one of the top ten famous flowers in traditional China, osmanthus is widely loved for its rich aroma. Many flower friends feel anxious when they discover that their beloved osmanthus leaves are drooping. In fact, leaf wilting is an important health signal from plants and requires us to conduct a comprehensive diagnosis in six dimensions, from root maintenance to environmental regulation. 1. Imbalanced water management, water shortage and wilting characteristics When a cracked layer of more than 3 cm appears on the surface of the basin soil, the leaves appear curled and drooping, and the leaves feel brittle when touching, it is a typical symptom of water shortage. At this time, the capillary roots have become dehydrated. It is recommended to use the dipping basin method to replenish water and place the flower pot in the water basin for 20 minutes to ensure that the water penetrates slowly. It is judged that if the soil in the basin continues to be moist and exudes a sour smell, and the base of the stem appears browning, it is necessary to remove the basin immediately for inspection. Healthy root systems should be milky white and elastic. If black and soft rotten root systems are found, disinfection scissors should be used to remove the necrotic tissue and replace it with a breathable substrate with perlite: vermiculite =3:1 for replanting. 2. Abnormal nutrient supply When excessive fertilization occurs, the leaf margins will appear scorched wilting. It is recommended to immediately irrigate with clear water for three consecutive times for leaching, and then apply 0.1% potassium dihydrogen phosphate solution to repair the cell membrane. Topdressing in spring and autumn should follow the principle of "thin fertilizer and frequent application", and use slow-release fertilizer with N-P-K=10-15-10, and 20 grains per season can meet growth needs. 3. Key points for temperature and humidity control When the environmental temperature exceeds 35℃, osmanthus will appear rapid transpiration wilting. It is recommended to build a 50% sunshade net during the high temperature season and cooperate with leaf spray in the morning and evening. In winter, it is necessary to maintain the overwintering temperature above 5℃. Double insulation film can be used to cover the plants, and pay attention to ventilation for 2 hours at noon every day. 4. Environmental adaptation mechanism Newly purchased or transplanted osmanthus fragrans will have an environmental adaptation period of 7-15 days, which is manifested by temporary leaf drooping. At this stage, the original lighting conditions should be maintained, and the placement position should not be changed at will. The flowerpot can be rotated regularly to ensure uniform light reception. When new buds germinate, it means that the adaptation is successful. 5. Long-term hardening of soil in soil improvement plans will cause suffocation wilting of roots. It is recommended to replace acidic culture soil with pH 5.5 -6.5 every spring. The formula is legular soil: river sand: pine needle =5:3:2, and 5% decomposed sheep manure is mixed as base fertilizer to ensure that the soil is loose and breathable. 6. Disease prevention measures Root rot can also cause leaf droop in the early stage, which can be controlled by irrigating roots with 50% carbendazim and 800 times solution. Regularly check the back of the leaves for red spider harm. If the insect is found, immediately spray the insect with 1000 times matrine once a week for 3 consecutive weeks.
Through systematic diagnosis and precise intervention, 90% of osmanthus wilting problems can recover within 2-3 weeks. It is recommended to establish a maintenance log to record key operations such as watering and fertilization, and adjust the maintenance plan in a timely manner based on the plant's response, so that Jingui can maintain a straight posture all year round.