Snow? Popcorn?

When I was a senior in high school, my English class studied a poem that impressed me. I was stumped by the author's use of the word snow. I think (but I’m not sure) that this is the poem we studied:

New feet within my garden go

New fingers stir the sod;

A troubadour upon the elm

Betrays the solitude.

New children play upon the green,

New weary sleep below;

And still the pensive spring returns,

And still the punctual snow!

Emily Dickenson

Can you guess what the snow was?

I’ve learned that Korea is famous for its Cherry Blossoms, and rightly so. I’ve never seen anything like it.
"I looked out the window and what did I see?

Popcorn popping on the apricot tree.

Spring has brought me such a nice surprise.

Popcorn popping right before my eyes!"