Food is an important part of a Vault - why not? A well fed populace will be healthy and happy. In other words, if you do not provide enough food, your Vault dwellers will lose Happiness and more importantly, will starve, losing health.
Food is vital, but is a lower priority than either power or water.
There are three basic sources of food:
- Diners, available from the start.
- Gardens, which provide lots of food in the late game.
- Nuka-Cola bottlers, which provide lots of food and water in the late game.