Throughout reading this Poem, I was asking myself, "am I going to be able to find a suggestion for improvement?"
Your writing style exudes poetic devices, like the consonance and assonance in the first line, and the repetition of rhythm throughout, interrupted with a changed rhythm in just the right places to create a mood. (switching from iambic to trochaic meter as an example.)
Your use of trochee is unique, at least from my experience in reading modern Poetry. ("I had seen him in the," as an example.)
Your rhymes are very original. ("owned, postponed).
Of course, anybody that would review a Poem without reading at least three times is, in my opinion, being disingenuous. As I was going through this the second time, my thought was "this is so easy to read, it makes a 42 line Poem as short as a haiku!"
But that first line, as neat as it is, does trip my tongue a bit. I can't see why you would want to do that, especially in a first line. I think it's because the rhythm switches on the words amidst and misty too early in the Poem.
I love the surprise ending.
As I read through this the first time, I felt that it was about a homeless man. Having read the ending, the second read left me confused. But by the time I read it the third time, tears came to my eyes.
The intention of this Poem is to evoke emotion. You succeeded.
The way you invoke perspective of looking up and looking down lends itself to Multivalence. The meanings in this Poem are both literal and spiritual. I can see this Poem being about a homeless man, or the way a Father feels "groundlessness" as he watches his son (or in my case, daughter) grow up. I can even read into this that it could be about Jesus praying in the Garden of Gethsemane.
Tongue tripping first line notwithstanding, this Poem deserves a 5.0, and I just promised myself after reading Storymaster's reminder about good reviewing that I would try to get my ratings to average a 3.0.
PS: I hope your Dad is okay!