Well don’t tell California they are doing it wrong. Yes they can be grown the same. No where does it state they must be indoors on hydroponics ... only difference I could see is added security to the farm. And making sure you don’t use pesticides on it.
“It’s a common misconception that hemp and marijuana are two different species of plant. In fact, they’re not distinct speciesTrusted Source at all. They’re just two different names for cannabis, a type of flowering plant in the Cannabaceae family. While science doesn’t differentiate between “hemp” and “marijuana,” the law does.”
Aka yes they can be grown exactly the same way the only difference is THC content :)