Spades are among the most crucial gardening tools. Without a spade, you can't dig, and if you can't dig you can grow very little However, if you don't sharpen your spade, you could be working ...

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 ...