Relying on rain water to water your potatoes is far to hit and miss. You need to water regularly in pots, if they are in the ground you have a little more latitude but even so they will need watering.

I have never watered my potatoes in the ground and they have cropped beautifully - but then I live in West Wales.

These are not in the ground but in containers St.

Yes, but I was replying to your comment that in the ground they still need watering. Not contradicting you, just being grateful that I don't have to water as often as lots of you.

Ours are in the ground and are watered rarely, we usually get a lot of rain but if we have sun for several days and a strong wind himself puts the sprinkler on. Had to do so in April!