Your ability to work the land! This comes in handy when establishing new cities and cultivating the soil around your holdings.
0: You know that the seeds need to go in the ground to grow.
1: Able to maintain a small herb garden.
2: Likely able to farm and support ones self.
3: Planning well enough for a whole House to survive a hard time.
4: Likely able to keep a whole Kinship from starvation.
5: All elf kind has likely been fed by the literal fruits of your labor.
6: Legendary grower of plants and feeder of the masses.