Wait about eight weeks after bloom to give the foliage time to ripen the bulbs for next year's bloom time. Then you can dig and move them. I only grow old fashioned heirlooms and have absolutely no problem with digging and moving them at the same time. If her plants are newer, more modern varieties, it might be best to cure the bulbs over the summer and plant them in the fall. Either way, though, you can dig them this spring/early summer.