The first attempts were with a post hole borer, however this was not successful - time-consuming, arm-aching, and it struggled with the heavy clay we have here. So I resorted to a mini-digger with power auger - much quicker and easier.
There were a few vines which did not grow from last year and these are being replaced by hand. This year's vine order allowed for a few "spares" for replacements and for adorning the shop when it is built.