The sale of potatoes
If you decide to update potato seeds for planting on a plot or in a field, then the first three reproductions are suitable for you. Professionals who grow potatoes know that reproductions below the third lose their quality, are susceptible to diseases and begin to degenerate as a variety.
They belong to seeds of mass reproduction and are not used for planting.
For those who have a greenhouse (or better, a cold frame) and a little free time, the method of growing mini-clubs from seeds is suitable. This is of course painstaking work.
But those gardeners who managed to grow tubers from seeds felt the difference.
You need to update the planting material at least once every 4 to 5 years, otherwise, degenerating, it will no longer bring the desired crop, but only increase the resources for its cultivation.