The context of the following conversation is Aubrey seeded the plants. They needed to be tended to every season.:
Aubrey says I really have what you call a "Green thumb".  I can grow anything..
The friend responds What are you doing right there in the soil?.
Aubrey responds Right now I'm seeding the soil.  Then with some water, fertilizer, sunlight, and a little time, we'll have a whole field of snow peas..
The friend responds And they'll grow forever and ever and feed our families?.
Aubrey responds Well, with the right care every season, we can grow snow peas and we can grow other stuff like beans, potatoes, and corn..
The friend responds If you plant a sesame seed from a hamburger bun, can we grow a hamburger tree?.