Joseph Waltel Jr: Irrigation system for commercial plant cultivation. December 19, 1989: US04887388 (29 worldwide citation)

In a system for commercial cultivation of plants and flowers, an open tray with recesses for readily inserting and removing flower pots having growing plants therein and using a so-called "ooze" tube (U.S. Pat. No. 3,613,309) disposed centrally between adjacent rows of said flower pots which waters ...