Prepare the area to ensure it is rich with nutrients and drains well so the transplanted plant can thrive after the shock of moving. Remove the plant without damaging its roots.
Pierce the soil a couple of inches past where the leaves end. Established hostas five years or older might have roots around a foot and a half long, so prepare to dig deep.
Dig a hole 1 ½ times wider than the hosta but shallower than the root ball. Once planted, thoroughly water the plant to minimize its shock, and water the plants regularly.
Transplant them in spring after they awaken from dormancy. If you don't want to water them too much, plant them in late summer or early fall when their blooming period ends.