Sampling beach plums today. Mostly marble size. One large tree only blueberry size fruit and sour. Some ripe some a week or more before ripe. A variation in sour and astringent taste. One sweet one had an unfortunate bitter after taste. Most had strong flavor. Many had just a light fruit load. Maybe birds or people picking them.
This one plenty fruit:
This one not ripe yet:
This one healthiest with best foliage about 6 ft tall: