Repeat Steps 3, 4 and 5 on the other side. The picture above shows all the guides in place: a lower string and an upper string, on each side of the hedge.
Measure between the stakes at one end, to make sure that they are separated by the same distance; repeat for other end.
For a bigger hedge, I would use a carpenter's level to check, at this point, that the two upper strings are level with each other, all along their length. But for small hedges such as mine, this step is not necessary.
With the guides in place, in Step 7 we begin the trimming....
