After the plant is fully established (three or more years), dig up the plant, ensuring you capture all the roots.
Remove the root clump (rhizomes) and slice through the roots with a sharp knife or pruners.
Replant in a full sun spot (6-8 hours) in rich soil with good drainage or a container plant mix.
Dig the hole twice as wide and the same depth as the original.
Add root hormone at the bottom of the hole, place the root ball in the center, and water.
Add compost and supplemental garden soil mixed with the native soil to the hole.
Water around the plant again and keep the soil consistently moist the first year but not soggy.