When the leaves of potatoes flower, Is that them ready?

I think you wait until they've finished flowering and the foliage dies back.

I planted mine in a tub in late March in a greenhouse. They're now about 3'x3' and have flower buds on them. I think I'll be having extra-new potatoes this year!

Hi Jake depending on when you planed I would wait a while yet - probably June or even early July... if they are in the ground (as opposed to a potato grow sack) you could try uncovering one of the tatties at the end of the drill in a few weeks time to see how they look.

I agree with Rydeboyz when the flowers go over, it depends on what you want, a good heavy crop of sizeable potatoes to feed a family! or a tasty small new potato as a special luxury, but if you pick them too small they will be rather tasteless. for the tasty early I'd say after the flower has died back.

Of course what we all forgot to ask you is are these 1st early 2nd early or main crop - it does make a difference to the harvesting time :-)