Garden rollers are a versatile tool with a number of uses such as preparing a flat, even seedbed for new grass, smoothing out lumps and divots, improving seed germination and correcting damage caused by frost heaving. A common hesitation when buying a garden roller is the risk of soil compaction, but this can be avoided by rolling only when necessary, and by keeping the weight as light as possible. This can be done by filling with water for most tasks, and only using sand when maximum pressure is needed.