This method produces small, whole planting setts, each weighing 200 g to 800 g, from minisetts as small as 25 g. The small, whole tuber setts produced by minisett rapid multiplication are excellent planting material for farmers and researchers. Each sett has a head, which means that sprouting is early, strong, and uniform. Also, these small, whole tuber setts have no cut surfaces and therefore rot less easily than cut pieces.