Thanks, JF, Fang and Gary.
Fang, you are too humble, I always think of you as a master gardener.
Gary, is your 7' soursop from the same batch of seeds you gave me? If it is, it must be due to the miracle weather of Florida. With my seedlings, location plays a major role, I think (duh). The littlest ones were under a tall Pomegranate, the bigger ones received partial shade. My cousin had hers in full sun, and they were burnt badly. They were the tallest plants when I gave them to her, but now they are the same size as my smallest ones.