In article , says...

Hi, long time since I've popped into u.r.g

I had my rear lawn relaid in April


https://www.flickr.com/photos/438292...in/dateposted-
public/

https://www.flickr.com/photos/438292...posted-public/


Those pics look to me like a perfectly acceptable lawn, for barely
three months old. As you continue to mow regularly, the grass will
tiller out to fill the gaps and get thicker.

Janet