...and to a lot of people, unmowed grass looks like weeds. Here is a picture of part of my lawn that has not been mowed since September.
It is not quite knee high in that photo. It is uneven in height, but there are no seed heads or flowers to deal with. There are also no weeds in that part of the lawn. This is part of an experiment. The rest of my lawn will join in on the experiment when it starts growing again...which was last week actually. The test is to see how long the lawn can go without watering or fertilizing.
The mowed part of my lawn went dormant but the tall part never did. In this pic you can see the frost damage from two nights when the temps dropped. We had dew going on when it froze, so the grass shows that damage.
Except for being so tall, the grass looks great. This lawn is in George West.