From Unofficial Stationeers Wiki

A Raw Potato
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Potatoes can be grown in hydroponics to yield 3 x Potato.
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.

Info Data
Time To Fruiting 1.1 Days*
Raw Nutrition 20%
Edible By Chickens No

Science: *These little guys are not like solar panels and only need sun on their specific "tile" to grow.