Wheat is a crop which will is growable on all types of farms. It takes 8 months to reach maturity which makes it both the longest-growing crop. Wheat can survive for 2 months without Water which coincidentally makes it also the least drought-resistant crop.
Compared to the Potato, it produces 50% more Food per month ( same output but 2 times longer time ) while requiring a bit less of Water per month, When compared to Corn, it produces the same amount of Food per month, but requires 33% less Water per month.
wheat processing is a bit complex, so the 50% extra food actually is a reward of processing it several times ( wheat -> flour -> water )