All right, I can't do it.



Haiku is a post-1600 form, and for my own sense of accomplishment, I'd like consistency. 



Tanka (5-7-5 with 7-7 answer) it is, then...



If leaves stayed on trees,

And flowers never withered

Would we not rejoice?

But the first fall of snowflakes

Tells us that spring will soon come.