"A flower box is a type of container in the form of a planter or box that is usually placed outdoors and used for displaying live ...
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plants and flowers, but it may also be used for growing herbs or other edible plants.
It is usually placed or affixed to an accessible location so the resident of a home may easily work with the plants in the container. A flower box may be installed under a window and supported in place by brackets on the wall below, in which case it may be called a window box. Flower boxes may also be used to line decks, patios, porches, steps, and sidewalks and they can even be hung from railings." - (en.wikipedia.org 06.05.2022)