I have two Ziziphus joazeiro plants that I started from seed in the late spring/early summer of 2021. They made it through the winter of 2021 with flying colors. I resisted the urge to water them. Now, they are going into their second winter. I keep them in clay pots with a soil mixture that could generously be described as terrible, comprised of used potting soil, sand, slightly larger grit, and a small amount of poor quality yard dirt. They are still quite small, but they more than doubled in height over the summer after I up-potted them into larger clay pots. I certainly hope to be able to keep them alive long term. So far, I'm seeing success with this Cerrado species.