These plants are near flowering size, ½” – 1" tubers, in 4"  pots.  With proper culture I expect these will flower in 1 year. 
 
This species is native to southern Greece, the eastern Aegean Islands, the island of Crete, and south western Turkey. Unlike the winter dormant Amorphophallus and Arisaema, Arum species are summer dormant. Unlike the winter dormant Amorphophallus and Arisaema, Arum species are summer dormant. Plants begin to grow in the cool fall and enter dormancy at the beginning of summer. Plants typically flower in early to mid-spring around the time of Helleborus (the Lentin Rose). The genus Arum grow from subterranean rhizome-like tubers. These differ from those of most Amorphophallus and Arisaema. The elongated tubers somewhat resemble those of Iris, but are completely underground. The tubers have the same purpose, to keep the plant alive during the dry season. Plants of this species grow 12” – 18”. Each growth point on the tuber produces 1 – 4 leaves. Each leaf is arrow-shaped (hastate), green, with some white watermarks. Individual leaves are 6” – 10” long and 5" wide. The plant alone is very ornamental. The inflorescence is produced from the center of the leaves. The inflorescence is single flowered and the flower opens as the leaves begin to senesce. The “flower” is actually a modified inflorescence that consists of the spathe (outer ornamental part) and the spadix (internal sexual bits). The spadix is 1½” – 3” tall. The spadix base is surrounded by the base of the spathe. The spathe is 5” – 8” tall. It is white with some purple at the base internally. The exterior is white to medium green. After flowering, if pollinated, the plants are replaced by an Infructescence of orange berries.