- Dig out the upper part of a second trench 1 foot deep and 1 foot wide. Move each
spadeful of soil forward (into the first trench), mixing the soil layers as little as
possible.
Dig a third trench, and so on, until the entire bed has
been double-dug. It helps to level the soil with a rake
every 3 to 4 trenches during the digging process. If you
do not, you may end up with a very deep trench at the
end of the bed. Then you will have to move a large
amount of soil from one end of the bed to the other to