Sedum is a compact perennial that adds a splash of color to the garden in late summer and early fall. This plant is low-maintenance and is capable of thriving with little attention. After several growing seasons, however, some varieties of sedum begin to look messy and become unable to support the weight of their blooms. When this occurs, it is necessary to dig the plants and split, or divide, the roots.
Prepare the new planting location before lifting the plants from the ground. Pull all grass and weeds and remove any rocks large enough to interfere with planting.
Dig the sedum plant carefully with a garden spade. Do not disturb the soil next to the stem; instead, begin loosening the soil several inches from the base to avoid damaging the root system. Gradually loosen the soil until the plant can be easily lifted.
Shake the sedum gently to remove excess soil and dead growth. Use your fingers or a sharp knife to separate the roots into three to five small clusters. Examine the sedum and dispose of any parts that look weak, as well as the woody center of the plant.
Plant the newly divided sedum roots at the same depth that they were previously growing. Water until the soil is thoroughly moistened, but not soggy.
Water the new plantings whenever the top inch of soil no longer sticks to your finger.