What is the recommended action if plants exhibit symptoms of overwatering?

The recommended action when plants exhibit symptoms of overwatering is to reduce watering and check drainage. Overwatering can lead to root rot and other serious plant health issues as it creates an anaerobic environment in the soil, preventing root systems from getting the oxygen they need. By reducing watering, you allow the soil to dry out and help prevent further damage to the roots.

Additionally, checking drainage is crucial because poor drainage can exacerbate overwatering problems. Ensuring that pots or landscape areas have adequate drainage will help prevent water from accumulating around the roots, which is essential for the overall health of the plants.

The other options do not address the fundamental issue of overwatering and could potentially lead to worsening plant health. Increasing fertilization might further stress the plant, as nutrient uptake is often hindered in waterlogged conditions. Exposing the plants to direct sunlight can also be counterproductive if the plants are stressed from overwatering. Changing the soil to a more nutrient-rich type does not resolve the immediate concern of excess moisture, and might not effectively address the drainage issue. Thus, focusing on watering practices and ensuring proper drainage is the most effective initial response to symptoms of overwatering.