Materials required: shovel, erosion control blanket and seed (optional), sod (optional), washed rocks (optional)
- Create an outlet at the sidewalk side of the garden by digging a shallow channel in the berm, allowing water to overflow in the intended location indicated on the Rain Garden Design.
- Use string, level and stakes to check that outlet is the lowest point along outside edge of the garden.
- Reinforce the outlet to prevent erosion, using rocks, sod or seed and erosion blanket, as per the Rain Garden Design.
- If using rock, spread washed rock in a 150mm (6in) layer
The rain garden outlet requires erosion protection since excess water leaving the garden will be concentrated at this location. Rocks or grass on the side of the berm meeting the existing lawn will slow the flow of water leaving the rain garden and protect the soil from eroding.