The best time to transplant plants that bloom in the spring is in the fall, and the best time to transplant plants that bloom in the fall is in the spring. Ideally, plants should be transplanted when they start to become dormant.
For best results, choose a day that is overcast or even rainy for transplanting. Because the plant loses some of its roots in the transplanting process, keep the move as stress-free as possible by removing most of the plant's foliage. Once the plant has been replanted, cover it with 3 to 4 inches of mulch. Water the plant well, and check on the plant every couple days to make sure that it is growing.