Overgrown herbaceous perennial Salvias need to be divided into multiple smaller plantings. In this video, Flowers by the Sea horticulturist and co-owner Kermit Carter demonstrates how to split perennials, which are plants that die to ground in cold weather but return annually. Many perennial Salvias with basal, rosette foliage have roots that spread to form clumps of multiple plants. Carter says that breaking a clump into smaller pieces is similar to working a jigsaw puzzle; find the clump's crowns and you find the division points. Carter demonstrates how to complete the task quickly using simple tools, such as your fingers and a serrated bread knife. He removes dead foliage and spent soil to ready the plants for replanting in quality potting mix. Then he explains how to encourage root growth by placing the pots in partial sun so soil doesn't get too dry.
Dividing Herbaceous Perennial Salvias is part of the Views from the Garden video series published in the FBTS Everything Salvias blog. Flowers by the Sea is a horticultural farm and an online, mail order Salvia nursery.