Potato's in pots

Hi all, at the beginning of the year I read a few topics on here about planting potato's in pots, and I thought I would give it a try, I got some seed potato's and put one in each 12ins x 12ins pots and added soil as they grew. They have shot up and are now about 18ins above the pots. I put in 5 main crop and 5 lates. The thing I need to no how to tell when are they ready to be tipped out and do I cut off any of the greenary to make them produce more?
Any help would be appreciated.

Trevor

 

I grew someinpots last year and they were delicious...I never cut any foilage and tipped the pots about two weeks after the flowers had faded.

 

Cheers, thanks for that, I'll do the same than and let you know how I get on

 

You would have got more spuds by growing them in dustbins as they would have more chance to grow up and be earthed up. People also grow them in empty compost bags etc

 

HAVE JUST EMPTIED MY FIRST POT OF NEW TATERS.
NO BLOOSOM AND NO CUTTING BACK. GOT ENOUGH TO FEED THREE PEOPLE FOR TWO DAYS.

 

having my first suttons foremost this coming weekend grew them in tubs 24/18/15 2 per tub,have five tubs ,also 4 tubs of spring onions and carrots combined,already picking those