The grass leaves will continue to grow once the turf has been laid, despite the fact that there is very little root to supply water and nutrients. This growth will contribute to the loss of water from the turf surface and to the depletion of nutrients from the turf.

Generally it is not good practice to let the grass get too long as this leads to weak growth which in turn invites attack by fungal diseases and allows weeds to establish.

Mowing Heights

The old adage - a little and often - can be applied to grass mowing. The more you mow the more individual grass leaves will grow and therefore your lawn will have a denser sward and conversely, the more infrequently you mow the thinner the sward and the more mossy, disease ridden and weedy it will become.