From Unofficial Stationeers Wiki
Potatoes can be grown in hydroponics trays. Provide water into piping (currently temperature of water doesn't matter, as well as other piping contents) and CO2 in atmosphere at 15oC-50oC Min ~7.7Kpa. The plants will produce oxygen and heat which you will need to remove.
|Time To Fruiting||1.1 Days*|
|Edible By Chickens||No|
Science: *These little guys are not like solar panels and only need sun on their specific "tile" to grow.
*I would recommend cooking these little guys in the Microwave to turn them into baked potatoes or save them to make some Fries