noun
flowers blooming in moonlight
Poetic, literary expression evoking a scene of flowers under the moon. Rare in modern everyday language; found in classical or artistic contexts.
花天月地の景色を詠んだ和歌がある。
There is a waka poem that sings of a scene of flowers blooming in moonlight.
A four-character compound combining 花 (flower), 天 (sky/heaven), 月 (moon), and 地 (earth/ground), suggesting a poetic landscape where flowers bloom under the moonlit sky. The exact origin is uncertain; it is a literary coinage rather than a common idiom.