Food Cultivator turrets provide a piece of food around your base once every 2 minutes at level 1, and up to once every 45 seconds when fully upgraded. They are supportive turrets, so don't attack. They are very cheap, costing 300 and only up to 1500 for upgrading.
Food Cultivator Turrets are very useful on Restaurant, where food is hard to secure, and Office, where food is always hidden in the deepest places.
This turret should not be confused with Termite's Food Cultivator ability, which is about as cabable as a level five turret but for far less money. Shows you how great Termite is!