Hello Ann
I'm in the Sierra Nevada at about 5000 feet, and I have two Jujubies, Lee, and Lang. They are planted in deep silty-loam, with about 24-30 inches of topsoil. It snows in winter, about zone 6 with lows in the teens. My jujubies, though surviving the winter cold, do suffer from some dieback, and aren't growing lushly like the apples and peaches are. After 4 years, the two
trees are more or less the same height they started out at, when planted. I've gotten a few fruit, but not even
enough for a filling snack.