window box

US /ˈwɪn.doʊ ˌbɑːks/
UK /ˈwɪn.doʊ ˌbɑːks/
"window box" picture
1.

fioriera, cassetta da finestra

a long, narrow container for growing plants, typically placed on a windowsill or attached to the outside of a window

:
She filled the window box with colorful petunias.
Ha riempito la fioriera con petunie colorate.
The old building had charming window boxes overflowing with geraniums.
Il vecchio edificio aveva affascinanti fioriere traboccanti di gerani.