The seedlings, as I have mentioned, might be a few years before a determination can be made. Larry_gene has said it took 2-3 years from a purchased 1-gallon plant and he is interested as well to see how long sexual maturation from seedlings will be evident. We shall see.
Female Seaberry Identification Photo^
Male Seaberry Identification Photo^As the seaberry plants are either male or female, they are not self-fertile. I have not been able to find any information on insect polinators. Everything I have read states the plants are wind polinated. Somehow, as time goes on, and if the plantings in Maine are successful, I'll bet there may be a bug or two up there which may lend a helping hand.