Why does frost heave occur in gardens?

By Melanie Mathieson Gardening Guru Frost heave happens when a soil, such as a garden soil is subjected to on going freezing and thawing temperatures. The pressure created from alternating freezing and thawing lifts the soil and creates pockets within the soil. If this occurs repeatedly the soil will heave upwards, out of the ground. The result leaves humps of soil and possibly plants laying on the soil surface, with exposed roots. This obviously can cause further damage to both the plants and the soil. Read more...