TL;DR
Cultivation recipes should have "(100% fresh)" note on either results or recipe's name.Why?
Cultivation recipes (both bacteria, pentapod eggs, fish breeding, captive spawner) have a flag `result_is_always_fresh=true` which means that the end result of crafting is always 100% fresh. Currently, this can only be seen on wube/factorio-data; even the in-game prototype viewer does not show the value of this field. However, there's a in-game hint stating spoilage of the result is always the same as spoilage of ingridients.The recipe for nutrients from spoilage does have such note, BTW.