As summer transitions to autumn, September presents a perfect opportunity for gardeners to divide perennials. This practice not only helps reinvigorate older plants but also promotes healthier blooms in the following seasons. Here are seven perennials that benefit greatly from division.
1. Daylilies (Hemerocallis)
Daylilies are a staple in many gardens, known for their vibrant blooms and resilience. Over time, these plants can become overcrowded, leading to fewer flowers. Dividing daylilies every three to five years will refresh their vigor. To divide, simply dig up the clump, separate the roots, and replant them at the same depth in well-drained soil. This will encourage lush foliage and abundant blooms in the next growing season.
2. Hostas
Hostas are beloved for their lush foliage and shade tolerance. They can grow large over the years, and division helps maintain their health and aesthetics. September is ideal for dividing hostas as they prepare for dormancy. Carefully dig around the clump, lift it out, and separate the root ball into smaller sections, ensuring each section has healthy roots. Replant the divisions in rich, moist soil for optimal growth.
3. Peonies
Peonies are known for their large, fragrant blooms, but they can become crowded as they mature. If you notice fewer flowers or smaller blooms, it’s time to divide. The best time to do this is in early fall, once the foliage begins to yellow. Dig up the entire plant and carefully divide the root system, ensuring that each division has at least three to five eyes (buds). Replant them at the same depth, and you’ll be rewarded with a spectacular display in the spring.
4. Sedum
Sedum, or stonecrop, is a hardy succulent that thrives in dry conditions. Over time, sedum can become leggy or sparse in the center. Division helps rejuvenate the plant and encourages bushier growth. Simply cut the plant back and divide it into smaller sections, then replant them in well-drained soil. This will not only enhance the plant’s appearance but also ensure a more robust flowering display in late summer and early fall.
5. Black-eyed Susans (Rudbeckia)
Black-eyed Susans are cheerful, daisy-like flowers that add warmth to any garden. They can become invasive if left unchecked, leading to overcrowding. Dividing them every few years will keep them in check and promote vigorous growth. In September, dig up the clump and separate it into smaller sections, each with roots and foliage. Replant in sunny spots, and you’ll enjoy a vibrant display next summer.
6. Coneflowers (Echinacea)
Coneflowers are known for their striking appearance and drought tolerance. Like many perennials, they can become overcrowded and produce fewer flowers over time. Dividing them every three to four years will help maintain their health. In early fall, dig up the coneflowers, separate the clumps, and replant them in well-draining soil. This process stimulates growth and enhances flower production.
7. Astilbe
Astilbe adds a soft, feathery texture to gardens, thriving in shady, moist areas. These plants can become congested, leading to reduced flowering. To revive them, divide astilbe in September. Dig around the plant and lift it carefully, separating the root clumps. Each division should be replanted at the same depth. This encourages fresh growth and stunning plumes in the following season.
Conclusion
Dividing perennials in September is an excellent way to rejuvenate your garden. By splitting these seven plants, you’ll encourage healthier growth and more abundant blooms in the upcoming seasons. Ensure you provide proper care after division, including adequate watering and mulching, to help your plants settle in and thrive. Happy gardening!
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