Causes and treatment of feather leaves lavender yellow leaves
As a Mediterranean specialty vanilla plant, lavender pinna is very popular among gardening enthusiasts for its silver-green feathery leaves and lavender inflorescences. However, many flower lovers often encounter leaf yellowing problems during the maintenance process. This article will analyze the four major yellowing factors from a professional perspective and provide highly operable solutions. 1. Improper environmental control causes imbalance between light intensity and duration in yellow leaves 1.1 As a typical all-day plant, lavender pinna needs to receive more than 6 hours of direct light every day. When light is insufficient, chlorophyll synthesis in leaves is blocked, which is manifested by yellowing of new leaves and excessive plant growth. In spring and autumn, it should be placed in an open environment facing south, and in winter, it should be used with a fill light to maintain the light intensity ≥3000lux. Use 50% sunshade net protection in summer to prevent strong light from burning leaves at noon. 1.2 When drastic fluctuations in temperature and humidity suddenly change the maintenance environment, it is recommended to adopt a gradual transition method: maintain 70% similarity of the original environment for the first 3 days, and add 10% new environmental factors every day thereafter. Combined spraying of 0.1% alginate solution can improve plant stress resistance and alleviate the yellow leaf phenomenon caused by environmental mutations. 2. Mistakes in cultivation management lead to yellowing 2.1 Improper water control Use the "fingertip detection method" to judge watering timing: Insert your index finger into the pot soil to a depth of 2cm, and irrigate only when it is completely dry. It is recommended to use red pottery pots with volcanic rock matrix (ratio: 40% red jade soil +30% deer swamp soil +30% perlite) for potted plants to ensure that the drainage speed is ≤3 seconds/500ml. When water accumulation occurs, bamboo charcoal particles can be spread to absorb excess water. 2.2 Apply lavender special slow-release fertilizer (NPK=7-3-5) once a month during the inappropriate growth period (March-June, September-November). When fertilizer damage occurs, the "three washes and one row" first-aid method is used: the substrate is rinsed with clean water for 3 consecutive days, and then the accumulated water is drained by siphon method. Damaged roots need to be soaked in chitin solution before being planted. 3. Systematically maintain a maintenance log to record daily light duration, temperature and humidity changes and plant status. It is recommended to set up a periodic checklist: test the pH value of the substrate every week (ideal value 6.5-7.5) and measure the EC value every month (appropriate range 0.8-1.2mS/cm). Shaping and pruning before overwintering and retaining 15-20cm of the trunk can effectively prevent yellowing of old leaves.
By accurately regulating the light cycle, scientifically improving the cultivation substrate, establishing a systematic maintenance plan, and cooperating with necessary emergency treatment measures, we can not only effectively solve the problem of feather leaves, lavender and yellow leaves, but also improve plant resistance and promote sustained flowering. It is recommended to replace new soil and supplement trace elements every spring to keep your lavender in a healthy silver-green state.