The first cut of a newly seeded lawn should be once the grass is 1.5 inches high. Before cutting, take a mower with a roller across the lawn with blades 'off cut' to firm plants into soil and press stones into the ground.

The first cut of a newly turfed lawn should be once the roots have strongly established (check by trying to peel back a turf).

Don't cut much off at first and never cut more than a third of the growth off at a time. Mowing encourages shoots to grow from base of plant so that the grass thickens up. Depth of root is related to height of plant. Sturdy grass needs deep roots so preferably use a cutting height of 0.5 inch (or more) to avoid scalping and weakening the grass.

Mow regularly according to growth, not the calendar - you may have to mow during mild winters too.