Coffee grounds can be beneficial for certain plants as they provide nutrients and act as a natural fertilizer. Plants like Azaleas and blueberries thrive when coffee grounds are added to the soil. However, it's important to note that some plants are sensitive to acidic conditions, and coffee grounds can be detrimental to them. It's advisable to use coffee grounds sparingly and avoid applying them directly to plants that prefer a more alkaline or neutral pH. Always consider the specific needs of your plants before using coffee grounds as a soil amendment.