Perennial plants are healthiest and most productive when they are young and have room to spread. Replant outer growth and discard the centers of older plants. Although it may be a bit frightening the first time, it is easy to divide astilbe. Replant outer growth and discard the centers of older plants Astilbe (Astilbe) Every 2 to 3 years as plants Keep the plants well-watered after replanting and they will re-establish themselves quickly. Spring: Spreading root division. Use a sharp spade or knife to divide … Baby’s Breath: Division is difficult; carefully divide in spring or late summer/early fall. Basket-of-Gold: Divide in late summer/early fall. How wonderful that we can rejuvenate even the oldest residents of a garden by occasionally dividing them. What season to divide Root type Special tips; Astilbe Astilbe spp. How Often To Divide Season To Divide: Method Of Division: Asters (Aster) Every year or two to control spread and maintain vigor. The PD Ann McCulloh The Astilbe plant is a perennial with fern-like foliage and colourful, feathery blossoms. When and How to Divide Some Common Perennials Common Name (Botanical Name) How Often to Divide Season to Divide Method of Division Asters (Aster) Every year or two to control spread and maintain vigor Spring Spreading root division. Read on to learn how to divide plants. Astilbe Dividing. Astilbe (Astilbe) Every 2 to 3 years as plants become crowded. Astilbe are relatively slow-growing plants and will bloom for many years before needing to be divided. There are a few good tips to keep in mind when dividing your astilbe to make sure next year’s stalks are strong. Addition of compost will also increase the content of essential organic matte… Dividing astilbe plants are good for the plants because it eliminates the formation of overcrowded clumps, and helps the plants stay heathy. When dividing perennials, timing and technique are important. Basket-of-gold also can be propagated by stem cuttings in spring or late summer. Divide astilbe plants every four to five years to keep the plants healthy. Spreading root division. Divide every 2 or 3 years in spring: Astilbe: Divide every 3 or 4 years in spring. If a plant must be moved or has outgrown its space, or if you want to make more plants from the original mother plant, do so in early spring or late fall. The best time to divide astilbe is either in the spring or the fall, when temperatures are cool and excessive heat won’t place unnecessary stress on divisions while they’re still getting established. In ideal conditions, Astilbe plants can grow quickly and require more frequent division. Submitted by The Editors on August 1, 2017 - 9:15am. But, that’s exactly what we do when we divide plants and the purpose is both to breathe new life into the plant and to propagate it. Wait until after the current blooms have died, dividing them on a cool early fall day. 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