Destructive behaviour in the garden such as digging is an issue I'm often called upon to resolve, with some dogs having turned a once well-manicured garden into a dirt bowl. It needn't be that way! Resolving digging problems takes some lateral thinking and a dose of patience to arrive at a lasting solution.

Digging problems in dogs can arise from a lack of physical and mental stimulation. The dig has a few stages that start with a sniff, then a more intense sniff, a little scratching and then into a full on dig.
Full supervision of your dog (especially in its first year) should prevent the opportunity to practice this behaviour in the garden or your valued borders.

Digging is a natural behaviour, and some breeds such as the Terriers are far more likely to indulge in such a habit. Your dog may be digging to create a cool patch, to ensure that it is adequately catered for in warmer weather.