Things That Seem Impossible

[71degrees]

I think the present tense is working pretty good here you've got that Updike thing going on. (grammar is not my best subject so take my statements on it with a grain of salt)

Hearing a song after it ends, living
in it, enjoying its faded beat, no words -- You might want to stick to more descriptions of the "song" as the subject as opposed to the one who is hearing it. "faded beat" seems more powerful than "enjoying"
now, just humming to a nameless tune,
something that starts when its music ends,
like that time at the intersection of London Road -- I don't get this reference. It could be me or the poem may benefit from some disambiguation (way too much Wikipedia for me).
and something, the dancing and the holding
to Color My World, like being in the middle
of an empty fairgrounds the night before it opens,
the empty seats, the passing automobiles’
occupants watching from a safe distance -- There may be a problem with your comma use that could be cleared up by a colon. When you begin with the fairgrounds you list things pertaining to that simile but it is somewhat unclear that you are confining the next list to that subject.

That moment when the sun rises, ignoring
the bleak breeze, and you realizing love is never
enough, but sometimes it is all there is, and at any -- love is somewhat ambiguous
moment you will raise your head and utter hello
as if it’s a culmination of oral love knowledge

Having one rose petal drop along your path,
exactly at a moment you most need it,
like the moment after mother died, after -- "mother" without my makes the poem seem like its addressing a familial relation.
her last funeral song played, and you waited
at a distance while father took her hand into his
for the last time, kissed it, and gently placed it
back into her coffin; sandalwood scent
was in the air and there it was, the rose petal,
and by the time you picked it up, father
was at your side and together you both
walked away from mother for the last time

You not remembering the exact moment -- you're?
a summer rain stopped falling but still enjoying
the smell and the wetness, those fleeting moments - I don't think you necessarily need two adjectives here.
remembering puddles in front of the Beach Road house, -- To me, capitalizing Beach Road makes it sound like you are referencing a famous location.
the single elm with its branches over the patio
you later took down after Dutch Disease sapped its core, -- I like the use of Dutch Disease.
and later seeing the east morning light in your window
where branches used to be, that light you remember-- remembering?
t
now when back then you didn’t realize was there at all -The syntax reads a little awkwardly in this last line to me.

There is a sense of fervency in this poem that I thought was very effective. In my opinion this immediacy would be highlighted better by keeping the poem in present tense. Thanks for posting.

Your critiques are always helpful and thoughtful. Moving the last two stanzas to present tense would present logistical / chronological problems. I was fifteen and forty years younger. But thanks. I totally agree w/your ending comments. Also, don't sell yourself short on your grammar knowledge. I'm always open to suggestions since I'm not a fan of end marks.