Last week fertilizer stocks all surged in unison after the world's largest mining company BHP Billiton (NYSE: BHP) tried, and failed, to acquire the world's largest potassium company Potash Corp. (NYSE: POT).

Right now, there's only one company in the sector that's still (relatively) inexpensive. More on that company in a minute…

First, a little tooting of my own horn: just over a month ago, I recommended you pick up shares of another fertilizer company (now the second largest) -Mosaic Co. (NYSE: MOS).

Here's what I said on July 22: