Using trench composting for gardening is very simple. All you need to do is dig a trench or hole about a foot deep, fill it ...

Dig out trenches to a spade's depth, known as a 'spit', and about 30cm (12in) wide. Place the soil from the first trench on the ground in front and work backwards along the plot, turning the soil ...

For a custom, permanent edge, consider a concrete trench. This approach involves marking your desired curve, then digging out a trench that matches its shape. While it's a bit more labor-intensive ...