Susie, your up north, and it gets really cold there. If you plant them in the ground, you will most likely have do dig them up, or at least take cuttings in the fall when it frost! I have some in pots in the shade, and some in the ground in full sun. Well, all of the ones in pots are doing much better than the ones in ground this year. If you have them in pots, they will need bigger pots later, as they get root bound pretty quick! I would move it around the yard, till you find a happy spot for it! I feed mine miracle grow at least once a week, and I double the recipe it calls for on the box! Especially when they are blooming. If you have access to aged horse, cow or donkey poo, soak it in water, make a tea from it. They like that too!
