potatoes in greenhouse

I Have grown lots of varieties of potatoes in my greenhouse in grow bags and pots.  I have been topping them up with soil for weeks.  At night I cover them with fleece.  It is getting hot during the day and I am needing to water th them every day.  At what point should I bring them outside .  Will they be ok in a greenhouse during the day when it is getting hot.  I am finding it difficult to judge how much water to give them.  Thanks

I find that the greenhouse potatoes develop a lot of weak top growth which is not able to stand up to the battering our west Cumbrian weather can give it. For that reason I leave them under glass but with all vents open and a fan blowing on hot days.

Had a furtle today and the first new spuds will be lifted this weekend.

Put mine in same time mid feb harvesring next wed