So added to this at harvest, scroll down to view the life and times of a potato.
To save digging when harvesting I have shallow planted the potatoes and made a frame out of corflute that the colorbond comes in. Bit of mulch on top and then just keep adding the mulch as they grow. The one you can see came up on its own accord. That simple.
Add the mulch
And away they go
Yellowing and wilting, ready to harvest
Soil looks great. No digging involved means no damage to potatoes or my back.