Cereals

[Tumuel]

A new crop (for example wheat, oats, barley, etc.) it would be slow growing, medium yield, but the food you get from it lasts much longer  unrefrigerated like hay or herbal meds.
The reason I ask for this is that I was considering playing a no electricity game but found it very difficult to go without a fridge, I know it would not be too difficult without a fridge on the right map but that would take away from the point somewhat.