Hey buddy, sorry I missed your post. Spot spray at half rate now & every 2 weeks after. Sulfur based products like image will travel through the roots to all the nutsedge so no need to blanket spray & risk the whole lawn.

perferct thanks for the reply

Once the grass is established and you cut back to deep and infrequent watering the nutsedge should not be that much of a problem. It is a swamp loving plant and likes wet feet. I've seen it growing on a sandbar in the middle of a river.