Self-watering air-producing plant tray system

A method of coupling and decoupling a screen to the bottom of a plant tray comprising:

• nesting a plant tray within a bottom screen having an upturned side structure;
• frictionally engaging and coupling the surrounding side structure of the plant tray with the upturn side structure of the screen and creating a frictional coupling fit between the plant tray and the screen;
• and detaching the screen from the plant tray structure by pulling the screen from the tray structure by overcoming the frictional fit between the upturn side structure of the screen and the plant tray.

An air pruning plant tray with a readily detachable frictionally fitted bottom screen comprising:

• a plant tray having a top, bottom, surrounding side structure, and a plurality of truncated plant cells with each plant cell having surrounding wall structure for holding a plant rowing medium such as soil, peat cake or peat mix;
• a screen detachably secured to the bottom of the plant tray for retaining the plant growing medium within the plant tray and for giving rise to air pruning;
• and the detachable screen including a turned up side that extends around the parameter of the screen and wherein the turned up side in an attached mode frictionally engages and couples with the surrounding side structure of the plant tray and effectively couples the screen to the bottom of the plant tray so as to form a unitary plant tray and screen structure, and wherein the screen can be readily removed from the surrounding side structure of the plant tray by pulling the screen away from the plant tray and overcoming the friction existing between the turned up side of the screen and the surrounding side structure of the plant tray.