Roundup is not effective without multiple applications. There are several other products specific to nutsedge that offer much better control, one of which is SedgeHammer.

Here is a link that might be useful: SedgeHammer

hortster,

Thanks, I will get it and start in the application cycle (since the nutsedge is well established, I will need to go over it multiple times this summer is my guess).

Regards,
Nikhil

the chemicals, don't work that well, if your soil is conducive to nutsedge and wet, it will always come back