Your poem is very beautiful, especially the line, "where the roots will tickle him like children." Similes and metaphors I can't help but love.

There is so much in this short poem! I love the lines "he will listen, eyes upward,  / brow furrowed, as though we / were the ghosts." It depicts the "man" as old, but young at heart.

Your poem is beautiful; its precision makes it so strong. One suggestion would be that since you end it with a period, you might want to start it with a capital letter. I just think this would be more natural; there is really no reason for you not to use capitalization. Happy writing!