Decades ago, working for $ so I could fund clay-learning time, I worked in a greenhouse and a Vermont farm.  Growing food as if there'd be none if I didn't was a self-sufficiency ethic then.  Now it means I don't need to drive a car in summer traffic and in April I'm eating asparagus, and collards from last year.  I transplanted these outside yesterday and a cold frame has the warm-loving things.  

Reading the soil that grows the leaves also tells about the light source.  I read how roots in a trench with no drainage moved laterally.  Is it the same with us?  What humans and plants might have in common about how we all get our needs met.