flower box

a box used for growing decorative plants in or around the home, often attached to a window ledge.

Origin of flower box

First recorded in 1875–80

The window was open, and the flower-box outside was in full scent and colour.

The Rubicon |E. F. Benson
The window sash was warped and stubborn; the woman excited, and in her anxiety something caught on the flower-box.

The Long Dim Trail |Forrestine C. Hooker
She took some earth from the flower-box in the window, and with all her might flung it after that disappearing figure.

The Forsyte Saga, Volume III. |John Galsworthy
I have schemes for a flower-box outside our windows at the flat.

Miss Merivale's Mistake |Mrs. Henry Clarke

Thar was twenty-five thousand in that flower-box he guv to Jamie and the Little Lady; and this makes ten more.

The Long Dim Trail |Forrestine C. Hooker