Sooooo, as I thought Show Berri was a common name (probably through you Masud ), is this really a cultivar or just mistaken for a cultivar? Where does one find a list of Ziziphus cultivars? It appears that Ziziphus mauritiana is common in warmer climates.
the Indian jujube, Z. mauritiana Lam. (syn. Z. jujuba L.) is adapted to warm climates