Push a mower up and down the ditch to determine how easy it is to maneuver. Use the push mower only if you can keep your grip on the machine and keep from slipping.
Start the push mower.
Walk the push mower up and down the hill. Do not mow horizontally along the hill since you may slip or the machine may tilt over.
Stop the mower every few passes. Unplug the spark plug by pulling on the connector. Check the underside of the machine for clogging from grass. Remove excess grass by hand. Grass in ditches is often very wet and tends to clump.
Start a grass trimmer. Stand on the ditch so that you have firm footing and swing the grass trimmer from side to side to remove the remainder of the grass in the ditch.