Since you did buy the plants, may I suggest you try “heeling them in” before you actually plant them?  Find a secluded, shady spot, then dig a trench large enough to accommodate all your plants.  SOAK the plants in a bucket of water for 3 hours, then lay them root end down in the trench , (plants should be at an angle, with the stems touching the earth, but the tops are above the trench).  Cover the roots with the excavated soil and a few handful of good garden soil, and LIGHTLY press the soil to remove air pockets.  Water thoroughly; keep soil moist, but not sloppy.  Do NOT fertilize; the plants most likely will burn.  Allow plants to remain in trench until they have 3-4 sets of healthy leaves.  If they don’t develop leaves in the trench, they probably never will.  Good luck!