Why aren't Farmers Planting Farina?

"What is Farina?"
WiseGeek

"Farina is a milled cereal grain, usually made from wheat germ and the inner parts of wheat kernels called the endosperm. Sometimes rice or potatoes can be milled and called farina too, but typically it’s considered wheat cereal. It has a very bland taste, which makes it adaptable to numerous toppings when it is prepared as a hot cereal, the typical preparation. Since it is so finely ground, it cooks quickly, and remains one of the more popular hot cereal choices.

"Many may be familiar with farina when sold as Cream of Wheat® or Malt-o-Meal®, which comes in quick cook and even instant varieties...."

So the answer to this post's title is that Farina is the product of a particular milling process, not a plant.

Farina is also the name of a township in North Dakota, and a family name: the 6704^th most common family name in America, as of May, 1995. (U. S. Census Bureau)