window farm (also windowfarm)
noun phrase

- small, vertical, hydroponic garden installed by a window and used for growing crops such as herbs and vegetables

(Wordspy)

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A window farm is a vertical, hydroponic farming system for year-round, indoor growing in your windows. Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. The word hydroponic is from the Greek "hydro" (water) and "ponos" (labour, work).

As the name implies, a window farm is installed vertically inside a window where enough sunlight exists. Although kits are available, do-it-yourselfers can make their own window farm by using empty plastic water bottles with the bottom cut off.

The bottles are then placed upside down and connected to aquarium pumps that circulate the liquid nutrients from the bottom reservoir to the top of the plant bottle. Water then trickles back down to the roots of the plants where the unabsorbed nutrients are collected and re-circulated. The plants grow out of holes cut into the side of the bottles.

Just about any vegetable (with the exception of root vegetables like carrots) or herb can be grown with a window farm, even in winter. Window farms are also pleasant to look at and some people enjoy the sound of trickling water. They are also advantageous for city-dwellers who don't have a garden or space in their flats to grow vegetables.

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Practice OWAD in a conversation today, say something like:

"A WINDOW FARM is a great idea for gardeners without a garden."