Waka poems were a popular art form in the Heian period, enough that the famous poet Fujiwara no Sadaie and Emperor Go-Toba sought to put together a selected collection of chosen verses.
So the flower has wilted during 
the long spring rains,
Las flores han perdido su color
con las lluvias de primavera,
E a flor murchou durante as longas chuvas de primavera,