An heirloom variety, Dwarf Siberian as the name implies originated from Russia. This open pollinated variety belongs to mustard family and is a highly nutritious. In addition Siberians are sweeter than other kale varieties. It over winters in most zones, but can be planted in in the spring or the fall. Does better than most in the spring after it has over wintered. Since Kale prefers the cold temperature, the lower temperature actually improves their flavor. Siberian Kale prefers well moisture during hotter months. Kale can be continually harvested throughout the season if outer leaves are clipped and the center bud is left intact.