When is the optimal time to spray bermudagrass and nutsedges?

The optimal time to spray bermudagrass and nutsedges is late spring after full leaf expansion. During this period, the plants have actively resumed growth, which is critical for the effectiveness of herbicides. At this time, the physiological processes within the plants—such as nutrient uptake—are at their peak, allowing for better absorption of the herbicides applied.

Herbicides tend to work best when the target plants are actively growing, as they can more effectively transport the chemicals throughout their systems. By applying treatment after full leaf expansion, you ensure that the herbicide will be absorbed and translocated within the plant, leading to more effective control.

In contrast, the other timing options present challenges for effective herbicide application. For example, early summer before dormancy may not be ideal because plants may be transitioning to a period of reduced growth. Similarly, applying herbicides during the flowering stage can be less effective as resources may be directed away from nutrient intake and growth, while application right after winter thaw can be problematic because plants may not yet be actively growing and may not effectively absorb the herbicide.