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10mm Drainage Gravel
This pea gravel is perfect for creating narrow drainage slits in waterlogged heavy ground. Cut 2″ wide spade depth slits in the pattern of a herringbone leading to a soak-away or other outlet and pour in 3 – 4 inches of this gravel.
Particularly good in waterlogged lawns but equally beneficial in borders, especially if the soil has been opened up with Coarse Sharp Sand.