If there's a will there's a way (Until a cyclone comes along)..

Have no idea if the pic is from China, but during a trip there, I saw people growing vegetables in the most incredible ways, lots of apartments with plastic bucket gardens and such. My favorite was this hutong courtyard building where we did a cooking class as a tourist thing—the courtyard had a trellis over it for sun blocking, but the trellis was grown out by a bunch of different types of squash—such a neat combo because the squash leaves were great at max blocking direct sun, and there were all these perfectly spherical squash hanging overhead. The cook grabbed one off a vine during the class for the recipe we were making. Have wanted to try that method ever since.

dude no you can’t put peashooters in the back lanes you have to use cabbagepults stop

Even comes complete with drainage!

Found this on a wiki page on Giant miscanthus.

Tldr; Less than 50% of 'suitable' land is in use.

I suspect their definition of suitable is also pretty narrow.

Or a giant robot.

Back when my wife and I were at our apartment. we had just about every surface that faced a window filled with plants. It was great.