Is it self-pollinating?  If not, you'll need another (maybe a different type) to pollinate.  I've heard that even self-pollinators yield more when they have a pollinator.

Check out Gene's Backyard (link below).  He successfully grows 6 blueberry bushes in Chicago soil.

http://www.midfex.org/yale/blue.html

Note, he also has 97 min-dwarf apple trees (not standard, not semi-dwarf, not dwarf, but mini-dwarf).  These trees only get 6 feet high at maturity.  They are available from Gurney's or Raintree nurseries.  I planted two of them this last year.