Here in Central Texas where we’re looking at 700-600 hours of winter chilling (hours below 45°), there are a couple of varieties that do well. Santa Rosa is a plum from California that has about a 700 hour chilling requirement that does well across Texas. Another is Methley. Even though Methley is a relatively low chiller, around 450 hours, it has a protracted bloom so it tends to set fruit in most seasons. They’re relatively easy to grow but they’re susceptible to the same diseases as peaches are. But you simply need to maintain a good open center system in order to reduce disease pressure.