This poem shows excellent control. You are skilled at directing your reader toward pace with line breaks and the words you choose. A few suggestions to follow:
The cloud devours the sun: Second winter begins. (do you really want a colon here?)
Rooms turn cold as reeled-in light, (is there a stronger verb for 'turn cold'?)
like a grown child leaving home,
abandons that which needs it most. (nice two closing lines to this stanza.)
Air is heavily felt (Again, something stronger than 'heavily felt'? which is awkward)
as though an announcement (cut 'as though' you don't need it)
of death just heard,
birds stop mid-song,
they fly away as one, ('they fly' into 'flying'?)
from sapling robbed
of youthful stance.
Silence finds new voice. (think you should cut the period here.)
Beyond walls that long to clap,
water pipes clank; radiators twang- (no dash, just a comma is sufficient)
the hum of house seeks a listener.
Withdraw under layers of linen (who is withdrawing?)
& watch frayed spider webs twirl
like young girls hair.
All food is rotten
without sun, (How does this fit with the rest of the poem? Why food now?)
flowers paddle in the (When did we move outside?)
mush of their fallen fruit,
dust grows confident
advancing from the cupboard top,
cancerous in its speed.
Weeks disguise themselves
as drawn-out days,
Time is a lie.
All words are weightless,
never reaching. (never reaching what?)
there is no sun
I am cold solar. (These last two lines are maybe a little heavy handed and I would consider cutting them. This is the only point in which you introduce yourself. Is it necessary?)
Just some thoughts.
Nice reading you.
Jen