Milan flowers are a favorite among gardeners for their tiny flowers clustered together and their pleasant fragrance. However, caring for these plants can be challenging as they have specific requirements for water and soil. Improper care can lead to yellowing leaves. Here's a look at what to do when Milan flowers develop yellow leaves.1. Inspect the RootsOne possible cause of yellowing leaves in Milan flowers is root issues. Overwatering, soil infestation with nematodes, or excessive fertilization can all lead to root problems and rot. If you discover rotten roots, trim them and remove any yellowing leaves. Replant the flower in fresh soil to allow it to recover. Once the plant has had time to heal, resume careful watering and fertilization to encourage recovery.2. Pay Attention to WateringMilan flowers prefer a slightly moist environment but dislike frequent watering, which can lead to leaf yellowing and shedding. Soil that is too dry is also problematic. Regularly check the soil moisture and the condition of the leaves. If the top leaves begin to wilt, it's a sign that the plant needs water.3. Soil AcidityMilan flowers thrive in slightly acidic soil. If the soil is too alkaline, it can cause leaf yellowing. To address this, apply a diluted solution of ferrous sulfate monthly. This not only supplies iron to the plant but also helps prevent the soil from becoming alkaline. Avoid using clay soil, which does not drain well and can lead to yellowing. Loam soil is ideal for Milan flowers, and the pot should be replaced with new soil every one to two years.