The potato confusion is now behind us. You're welcome.

For those of you who have been holding your breath wondering when I should pull the potatoes, you are now free to exhale. I'm going with the wait-for-the-stalk-to-die method over the wait-for-the-flower-to-die route.

This is a potato from a stalk that has dead flowers yet still green. The color looks good and all, but it's pretty dinky compared to...

...a potato from the dead stalk. It's definitely bigger and more ready to be smothered in butter.