I generally plant my spuds in tyre towers as I get a MUCH bigger crop.
lay tyres on the floor cover floor with cardboard then straw, then manure then soil, place the spud in the soil then earth over. As the leaves appear add another tyre and repeat with earth until the tower is 4 - 6 layers high then 'allow' the leaves to grow and flower.
Keep well watered.
Truly you will be amazed at the crop you get and as they are above the ground no rotting in this very wet weather and no frosting so can start earlier than in the ground.