A scarifier is a device which is used to cut through your lawn, removing and dead grass or unwanted moss. It aerates and helps to revive a tired lawn.
The best time to use a scarifier is in the autumn or late spring, you should only need to do this once a year. Make sure your turf is dry and cut it before scarifying, ensure the scarifier is on the highest setting and do lines and then again at a right angle. Scatter lawn seed to fill any gaps and you will rejuvenate your lawn.