> I suspect it's hydroponic. It's axiomatically-speaking the one of the only few ways to make it happen. "zero pesticides" implies no bugs/insects around to n

> I suspect it's hydroponic. It's axiomatically-speaking the one of the only few ways to make it happen. "zero pesticides" implies no bugs/insects around to need spraying it in the first place, and doing that requires (A) a clean environment + (B) no regular soil (regular soil may have insect eggs / fungi in them). The only things that come to mind are hydroponics & hydrogel agriculture. https://en.wikipedia.org/wiki/Hydrogel_agriculture https://en.wikipedia.org/wiki/Hydrogel_agriculture