Tall Stand Plant : Aclk Sa L Ai Dchcsewijsbsmpil1ahuc6hckhqhiafyyababggjlzg Sig Aod64 1hsil Foc5ppll5g3 5cgzwf1ypq Adurl Ctype 5 - Big bluestem has an extensive root system that can reach down 10 feet or more.