I have salavatski in zone 6b in the ground, ( with some simple protection and south facing near the house) and it does well. It produces decent fruit. It took about four years for the fruit to fully ripen. In earlier years, the fruit would set and later drop off in August-September. I prefer salavatski poms to "wonderful" variety in supermarkets. It has a sweeter flavor, but the the fruit is smaller. Let me know if you'd like cuttings.