Judging by observing whether there are bud eyes on the surface of potatoes, whether there are small buds on the surface of potatoes, and whether there is peculiar smell on the surface of potatoes.

1 Observe whether there are bud eyes on the potato surface. Usually, the bud eyes will grow on the bulge or tumor of the potato, and the color of the bud eyes is generally light green or purple.

2. Observe whether there are small buds on the surface of the potato. If there are small buds, the potato has begun to sprout.

3. Smell the potato surface for any peculiar smell. If there is a pungent smell on the potato surface, it means that the potato has begun to rot and should be treated immediately.