Trough for Blooms Attached to a Sill

This page is the CodyCross answer for the clue below from Art Museum, Group 721, Puzzle 5 (Public Display).

Question is: Trough for Blooms Attached to a Sill

and the answer is: WINDOWBOX

Word Meaning:

WINDOW BOX — A narrow box filled with earth, placed on a windowsill and used for growing plants.

Definitions from Wiktionary.