I loved how the title lead into the poem, that was unique... it took me a second to pick up on it haha. Only suggestion is I would make a stronger pause after wild flowers, like perhaps a dash? I just feel like it should be more than a comma but it's up to you! Otherwise, brilliant and wonderful imagery Mel.

'neath sugar snowflakes
^^
impressive start, inspired use of sugar

slumber lilac wild flowers,
^^
I love the word slumber and put to great use

snow angels at peace.
^^
beautiful ending

I dont think you need any punctuation.

Great job.