Types of Gravel Used for Drainage

Crushed stone

• This is man-made gravel, and it is not very suitable for garden paths because it is likely to have sharp edges and corners. It is not particularly decorative, and is usually used with concrete for surfacing roads. In order to be classified as gravel, stone must measure between 1/24 and 1/12 inch. Man-made gravel is more robust than other other types which makes it suitable for heavy use.

Creek Rock

• This type of gravel comes from rivers and creeks. Because it has been washed by the water it has softened rounded contours which makes it suitable for garden use. It is decorative and comes in natural shapes. Creek rock gravel provides good drainage.

Piedmont and Bank Gravel

• Piedmont gravel is gravel that has been carried down from high up in a stream to a lower level. This is a coarse form of gravel. Bank gravel is found on the banks of rivers and streams. It may be mixed with sand or clay, depending on the soil type in the area. Both these types of gravel are variations of the natural form and can be used for decorative as well as for drainage and landscaping purposes.