The Scarifier cartridge is Allett’s most popular cultivation cartridge and is designed to remove thatch, surface debris and dead moss. This cartridge also helps lift lateral growth upright before mowing. The scarifier has a custom design helps to keep your lawn surface healthy and disease-free, by allowing air and water to penetrate the soil surface. The machine is designed with rotating tines that pull out the dead grass and moss to enable the passage of nutrients into the soil, with ease.The rotating spring tines are relatively gentle on the lawn and this cartridge can be used most of the year without fear of damage to keep on top of thatch levels as well as being useful to collect up leaves during the autumn. The use of the spring tine allows for safe cultivation where tree roots may be close to the surface. This is the best cartridge for beginners to turf cultivation as it is unlikely to cause damage if set too deeply but will give great results if used regularly.Picks up leaves, pine needles and pine cones as well.We suggest scarifying once a month during the mowing season to keep on top of thatch levels- you will be surprised just how much thatch builds up!