Foxy Lady: i have it from one site that it's "the growing of plants without soil," Ma'am. and here's one of the few sites i've found so far that doesn't look to be trying to sell a specific line of hydroponics equipment.
(hide) If you are waiting for your turn, click on "change" next to the "refresh" on the main page, then set refresh the page to 30 seconds to get your turn to move displayed faster. (Servant) (show all tips)