Is this a trick question? Who on earth could tell?

Not a trick - the big one's organic. The other one's been sprayed with an inhibitor to stop it sprouting. Makes you think doesn't it, especially if you like potatoes done in their skins. No wonder I'm inhibited after years of eating those...

Thanks Sue, when I saw the first reply I thought I'd asked a daft question but fortunately I hadn't.
Does anyone know if the organic one is worth setting or should it be discarded ?

Very interesting photo. I wonder if Tesco et.al. could be persuaded to display it in their stores - probably not. I am pleased to note that we eat organic as far as possible.

Well you learn something new every day!

Thanks all, the spud is now in the ground

You're not inhibited, are you, Stera?

I used to think not, but when I read modern books I begin to think I missed something...

Ah, well... I think probably a lot of us ate those treated potatoes... (or more than will admit ...)