I had one growing very successfully in a bed on the north side of the house which gets sun befor 9am and after 3:30ish from mid April to early October. It was bright and healthy and even flowered. Unfortunately it was frozen to death in January 2009. I've tried growing two new ones in slightly more sheltered spots but the last 2 winters have seen them off too.
As long as your shed doesn't make the chosen spot too dark, I think it's worth a try. You could also consider painting the shed a pale colour to reflect available light.