There isn't much to a rototiller. ... You'll want to set tiller depth to 4 to 6 inches to turn grass. If it's less than that, the tiller won't do its job, but if it's more than that, you'll be digging up stones and tree roots, which can damage the tiller.

Will grass grow back after tilling?

After the tiller breaks through the remaining grass and loosens the soil, the grass remaining in the soil still can grow from its roots and/or seeds. Unless you want to fight weeds and grass throughout the gardening season, remove the remaining grass before you plant crops, advises the National Gardening Association.

Should I kill grass before tilling?

Should I remove grass before tilling? Yes, you should remove the grass before tilling so that you get a smoother run for the blades. Plus, the older grass won't regrow if you remove all the grass before you till the ground.