That's good the root ball looked healthy, you and your son are definitely attentive, he must get it from you! ;D
Your wish came true!

Pistils highlighted.

With the identified female(s), I would recommend ensuring light cycles are clean, meaning full dark during dark hours and no disturbances (lack of light) during the hours it's supposed to be getting light, and if growing these outdoors ensure there is no light pollution at night if possible, because this can cause the plant stress that we don't want, and it could result in hermaphrodite.

It's looking really good! Is this the last remaining or do you have more plants to identify? Excellent job your son and you are doing here.