Just What Is "Frost Heave"? | Best Pick Reports

Another problem that can occur if your yard doesn’t drain properly is a phenomenon known as frost heave. When it gets cold enough, the ground will freeze from the top down. This creates a boundary between the frozen ground near the surface and the unfrozen ground beneath it. If the unfrozen ground contains a lot of water, which can be the case if your lawn doesn’t drain effectively, this water will percolate up into the frozen soil, freeze, and displace the surrounding earth. After the ground warms in the spring, the frozen soil will thaw and the ground that was displaced will collapse. This will cause fissures in your lawn that can threaten its landscape and structures.