How to level a bumpy lawn in 5 easy steps: 1. Prepare the Area: Mow the lawn short around 3cm this makes it easier to apply topdressing and you get better visibility of any low spots 2. Now mix Mix the Materials: Combine topsoil, sand, and compost in a 2:2:1 ratio. This combination provides bulk, drainage and nutrients to help the grass flourish. 3. Apply the Mix: Spread the mixture over the lawn or focus on low areas. 4. Level the Mix: Use the back of a rake or a lawn levelling rake to a pread