Exactly
Show me any farm that doesn’t use them
I’ll wait
Show me any farm that doesn’t use them
I’ll wait
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.