Rhizosphere Plants

After extensive research, during the planning stage of our permaculture yard, I came up with the following list that can work well in my Zone 5b, semi-arid, Colorado climate.  Please note that this list hasn’t been tested yet.  I will update as I test species in my yard.  It is purely based on research.

Rhizosphere Layer Plants
Yacon   Potato type plant http://www.raintreenursery.com/Yacon.html