We have had this lawn since several years We do not need to mow the lawn, We just clear the lawn of all weeds. We rake it and then put a layer of fertile soil over it.
This method has saved us from planting the lawn afresh as is done in many gardens. It is a joy to walk on this lawn. Walking barefoot in a lawn they say is good for health. Since it is on the terrace we have no fear of any reptiles or other critters bothering us there.
This grass does not need mowing as you can see it turns into clumps and maintains the height. It also has the tendency to multiply
One needs to take care of leakages on terraces and for that a thick rexine sheet is laid and over it we have spread sand and brick pieces.
Do you have a terrace lawn?