Yeah usually the yellowing of leaves means the plant is done growing and so will the spuds underground. If the frosts come first I just pull them out so they dont get frozen. But usually the yellowing of the leaves happen right around that time.
Yep @cryptopie taught me that, I did not know you could eat raw Sweet Potato leaves. You can saute them but I like to eat them right off the plant. It tastes like salad greens to me.
Hahaha that's a new one. I didn't even know, I'll probably check out potatoes if I get to my village and Maybe I'll try cooking it as well.
Just remember only Sweet Potato leaves can be eaten as far as I know. If you ate white, yellow or red Potato leaves they can make you sick.
Sweet Potatoes are in a different family than other Potatoes.