The first tree to lose its leaves?

Well maybe, I'm no expert. I've just entered for a poetry competition, which is an unusual thing for me to do. My poem is called Us in Queen Street Station. It's about two people meeting up who are attracted to each other, but are still a bit unsure. Somehow, over the course of a day they grow into each and become passionate. I don't really know anything about poetry, except that it is a way to use words economically.