I’m not quite clear on how irrigation is handled, and there are some outgas and other environmental issues involved with plywood, but this is a promising-looking vertical-gardening possibility otherwise. Didn’t find mention anywhere else in DK, so, as reported at Verdict for the 16th annual World Earth Day —https://www.verdict.co.uk/world-earth-day-2018-positive-environment/—
...Designers Sine Lindholm and Mads-Ulrik Husum working at Space10, an ideas lab run by IKEA, came up with the Grow Room. Nothing but plywood and screws are necessary to build the free-standing spherical pavilion. By building upwards rather than sideways, the structure can produce lots of food in a small space.
They note:
“Local food represents a serious alternative to the global food model. It reduces food miles, our pressure on the environment, and educates our children of where food actually comes from. The result on the dining table is just as fascinating.”
IKEA made the cutting files for the Grow Room available for free….
….The Growroom is a spherical urban farm that enables people to grow their own food right on their doorstep. We have open sourced the design meaning anyone can download the cutting files and produce their own grow room locally…..
Photos of the cut pieces, stages of construction, and finished results at the links.
Maybe commenters know of other/similar approaches.