Leaf Spot Guide

When & How to Treat for Leaf Spot

Treating leaf spot is similar to treating other fungal turf diseases, but it’s important to understand the right timing and method for controlling this particular fungus.

Lawn Disease Treatment and Control

The best way to control and eliminate leaf spot is to begin treatment as soon as you notice the first signs of the disease.

Select a fungicide that is specifically labeled to treat turf leaf spot fungal disease. Apply it directly to the affected areas, and consider spraying the surrounding areas to prevent further spread.

If the disease has already progressed, making the grass blades nearly overtaken by the lesions, or if melting out has started, it may be difficult to control. In the case of melting out, the disease has advanced significantly. If it's in the early stages, applying a fungicide can help reduce its spread, but it will not reverse the damage. However, it can help contain the disease and prevent it from spreading further. The affected grass will thin, but once the disease runs its course, you can reseed the area.

If the fungicide doesn't seem to be working, you can apply a preventative treatment in the spring to avoid future outbreaks of leaf spot.

To prevent the fungus from developing resistance to your treatments, it's essential to rotate your fungicide products. You will likely need to reapply throughout the growing season, so be sure to follow the application instructions and timing guidelines on the product label.