This refers to a method widely used in Europe to get potatoes 2 or 3 weeks before anyone else. To do this, cut your certified seed potatoes such that each piece has two “eyes” in case one doesn’t sprout. Lay them on a tray in total darkness for several weeks at temperatures of at least 70F. until sprouts begin to appear. If both eyes sprout, you can divide them. Then expose them to at least 8 hours of light for two weeks until short, thick, sturdy sprouts form. They’re ready to plant when the sprouts are an inch long. You can plant these outside a week or so before last frost date. If your seed sprouts are ready but the weather isn’t, keep them in a cool, dark place temporarily. This isn’t the only way to do it, but it’s the way I’ve found works best.
Potatoes are fun crop, not only for the homegrown flavor you won’t find in a store, but for the lovely flowers the plants send up, and because reaching your hand into the hill is like finding Christmas presents under the tree.