Container planting:
Water your plant a couple of days before dividing and transplanting. Inspect your plant for overcrowding or if you want to spread more of the love in your garden. If it is root-bound in the pot, remove the plant and tease and pull apart the mass of roots. You can use a sharp, sterilized knife to divide the root mass. Ensure you have several healthy root sections in each division. Divide each clump into its new pot, using a size smaller to compensate for less root mass and deep enough for its roots to grow. Plant in well-draining potting mix amended with rooting hormone. Place the plant at the same level as the previous pot adding soil at the bottom. Water the soil and add more if settling occurs. Set it in medium sunlight for several weeks to settle in. Check the moisture daily to keep the soil moist while the roots establish. After 6-8 weeks, roots will begin to develop. You can tug onto the stem to ensure the roots are anchoring well. Once its roots establish, move the container to a sunny spot giving it full sun (6-8 hours).
Garden planting: Water your plant a couple of days before dividing and transplanting. Lift the plant out of the ground with a shovel. Lay it gently on the ground with roots in tack. Use a knife to cut through the roots and divide the clump into sections for replanting. Transplant each clump by digging the hole no deeper than the root system and twice as wide. Center the transplant in the hole and add rooting hormone around the roots and water. Fill in around the plant with organic matter mixed with the native soil, careful not to cover it any more than the original plant. Water again well and monitor the soil moisture if it begins to dry.