A bog garden employs permanently moist (but not waterlogged) soil to create a habitat for plants and creatures which thrive in such conditions. It may exploit existing poor drainage in the garden, or it may be artificially created using pond liners or other materials to trap water in the area. Any such structure must allow a small amount of seepage to prevent the water stagnating. For instance, a pond liner must be pierced a few times. Typically a bog garden consists of a shallow area adjoining a pond or other water feature, but care must be taken to prevent water draining from a higher to a lower level. The minimum sustainable depth is 40–45 cm (16–18 in). Good drainage is provided by gravel placed over the liner, and the bog can be kept watered by using a perforated hose below the surface.
Creating a bog garden in your landscape is an enjoyable project that allows you to experiment with different plant species. So exactly what is a bog garden anyway? Bog gardens exist in nature in low-lying areas, or around ponds, lakes or streams. Bog garden plants love overly moist soil, which is waterlogged, but not standing. These marshy gardens make a lovely attraction in any landscape and can quickly turn an unused, water-logged spot in the yard into a wonderful scenic attraction.
Having a waterlogged or boggy bit of garden is not always inspiring and the immediate impulse may be to install drainage, but by working with nature it is possible to provide another really valuable habitat in your garden.
Do you have a spot in your yard which you despair of because it is poorly-drained and consistently moist? Why not consider turning a liability into an asset by creating an intentional wetland?