Sometimes my potatoes do that, does that mean I can plant them?
Absolutely!!! Cut them in half or so and plant them about 6-8 inches deep.
In fact all potatoes will do it. But here is a hint: if you are storing potatoes and DON’T want it to happen, then add one thing in with them - an apple!
Apples give off a natural ethylene gas and will stop potatoes from sprouting.