We call them “root vegetables,” but that’s a lie. A potato is not a root. It’s a stem. Yes, that lumpy, earthy thing you mash is actually a swollen underground stem.
Think of it as a plant’s secret pantry. Stems store food, and potatoes are master hoarders. They’re called tubers, which is just a fancy word for “chubby stem.”
Roots are boring. They just suck up water. Stems are wild—they can grow eyes, sprout leaves, and produce new plants. Potatoes do all that.
How to Spot a Stem (Without a Lab Coat)
Look at a potato. See those little dimples? Those are eyes. They are actually buds—just like the buds on a tree branch. Roots don’t have eyes. Stems do.
Now cut a potato open. Notice the flesh? Stems have a structure called nodes and internodes. In a potato, those nodes are where the eyes sit. Roots are smooth and stringy. Potatoes are dense and chunky.
Here’s the kicker: If you bury a potato, it doesn’t grow roots from its body. It grows shoots from the eyes—upward toward the light. That’s classic stem behavior. Roots don’t shoot for the sun; they dive deep.
