Multiply your blooms by dividing your perennials at just the right moment. Perennial plants offer lasting beauty to your garden, with flowers that reappear year after year. Properly dividing them can lead to remarkable growth. “Dividing perennials stops overcrowding and revives plants to produce more blooms and robust growth,” says Tammy Sons, founder and CEO of TN Nursery. The technique helps plants grow deeper roots for better nutrient absorption.
For a flourishing garden, it’s crucial to know when and how to divide your perennials. The best times are usually early spring and fall, minimizing stress and allowing plants to establish new roots before facing extreme weather conditions. However, specific timing can vary by species. According to Sons, daylilies and hostas benefit from early spring division, while irises do well with late summer splits.
Avoid dividing perennials when they are blooming, as this can disrupt flower production. “You should divide peonies in the fall,” advises Lorraine Ballato, a horticulturist at the New York Botanical Garden. This timing coincides with the plant’s natural re-energizing phase after summer.
Signs that your perennials need division include fewer blooms, dead areas, and spread into other regions. If plants are crowded, division grants them more space. “The easiest method is to dig up the plant entirely,” explains Laura Janney, CEO of Inspired Garden. Remove extra soil and dead parts, then use a sharp spade for larger plants or a knife for smaller ones to make the cut cleanly. Replant immediately and water generously.
A sharp tool is essential for lifting plants without damaging their root systems. Keep newly divided plants in a shaded and moist environment to reduce transplant shock. Ensuring plants are hydrated and healthy before division enhances their recovery. “Never divide stressed plants,” Janney advises.
“Watering is vital,” she adds, highlighting the need for gradual watering to support the disturbed roots. If a plant seems stressed, such as appearing droopy, increase watering to assist its recovery.
