Potatoes germinate when the skin turns green and there are teeth marks in the eyes. Whether potatoes germinate or not can be observed by observing the epidermis and bud eyes of potatoes, as follows:

1. Observe the skin of potato. If the skin of the potato turns green and has bud marks, it means it has sprouted.

2. Observe the bud eyes of potatoes. If the bud eye is enlarged with bud marks and wrinkles on the surface, it means that it has sprouted.