Grow Potatoes Grow

I've been told that as long as the top is green the potatoes are growing underneath..and when the tops turn brown and die .then the potatoes are ready...I shall see...of course I'm trying to be the good Farmers wife...(Cecil and I are pretending we have a big farm and our little "almost acre" is a giant farm :o) Hey! what ever makes us happy!< We are intitled