Dan writes
I have sparingly applied 1 - 2 applications.
How long it takes really depends on how established the nutsedge has gotten in the yard. It should be noted that weeds can develop resistance to herbicides such as Sedgehammer. To minimize the potential for resistance development and/or to control resistant weed biotypes, use a variety of cultural, mechanical, and chemical weed control tactics. Rotate with herbicides having other modes of action such as Blindside. With Sedgehammer per the label: Symptoms are likely to show within 2 weeks and though it often works with one application, but depending on the size and age of the nutsedge a second treatment may be required 6 to 10 weeks after the initial treatment. .
Answer last updated on: 07/06/2016