What Causes the Leaves of Lilacs to Become Wilted
As a common ornamental flower in gardens, lilacs are deeply loved for their fragrant aroma. However, when the leaves lose their rigid posture, it often indicates a problem with the plant's health. This article analyzes the causes of leaf wilting from four dimensions and provides professional-level treatment solutions.
Wilted Leaves Caused by Improper Light Management
Imbalance in Light Intensity Manifestation
Lilacs are positive plants, requiring 4-6 hours of direct sunlight per day. Long-term exposure to weak light can hinder photosynthesis, which is manifested as: new leaves becoming yellow and smaller, old leaves' edges drooping, and leaf spacing elongating.
Scientific Light Supplement Strategy
In spring and autumn, it is recommended to provide full sunlight care, while in the hot summer season, sunshades are needed for protection. For indoor care, rotate the pot regularly, and install a 30W light supplement per square meter, keeping it 50cm away from the plant for 3 hours of light supplementation daily. In winter, full direct sunlight can be accepted.
Water Imbalance Leading to Leaf Dehydration
Identifying Watering Mistakes
Water supplementation is needed when the surface soil turns white and becomes lighter. Common mistakes include: frequent shallow watering causing roots to float,浇灌with cold water in winter causing frost damage, and watering during high temperatures at noon causing scalding from evapotranspiration.
Step-by-Step Watering Plan
Adopt the "333" watering method: the first watering is 1/3 of the pot capacity, followed by another 1/3 after 10 minutes, and fully watered after half an hour. Clay pots should be watered twice a week, while glazed pots should be watered every 4 days. The immersion pot method can be used to ensure deep water absorption.
Impact of Cultivation Substrate Deterioration
Soil Health Testing
Quality cultivation soil should meet the following criteria: pH value of 6.0-7.5, EC value of 0.8-1.2mS/cm, and organic matter content of ≥30%. Compacted soil can be tested by inserting a bamboo skewer; high resistance indicates the need for soil replacement.
Substrate Improvement Formula
Recommended ratio: decomposed leaf soil 40% + coarse river sand 30% + perlite 20% + bone meal 10%. When repotting, retain 1/3 of the protective soil and trim 1/3 of the old roots. After repotting, water with a root-setting water solution (adding 50ppm naphthalene acetic acid).
Key Points for Microenvironment Regulation
Air Circulation Standards
Maintain a wind speed of 0.5-1m/s, and indoors, a circulating fan can be installed to run for 4 hours daily. During the rainy season, it is important to prevent waterlogging and remove accumulated water from trays after rain. It is recommended to keep a plant spacing of more than 50cm.
Temperature and Humidity Synergy Control
The optimal growth temperature is 15-28°C, with a relative humidity of 60%-75%. In summer, misting can be used to cool down, but it should be combined with ventilation to prevent mold. In winter, use a humidifier during the heating period to maintain humidity.
By systematically checking the four major elements of light, water, substrate, and environment, and combining the quantitative indicators provided in the article, the causes of leaf wilting in lilacs can be accurately located. It is recommended to conduct a plant health check every month and establish a care log to record key parameter changes for preventive maintenance management.