I will gladly add you as a late addition to the class if you want, if only so you can have the information.
The farmers are not only tending the plants that have been kept safe, but they're also learning about the new plant life that's sprung up after the nuclear bomb -- that would be Caprica, Neville, Beth, Commander Shepard, Regina, and others; but Lincoln, one of the Grounders, is also knowledgeable, and some of the Sky People have become so.