For most perennials, the late summer and fall is the best time to divide. The following perennials are great for dividing and transplanting. Gardening Perennials Plants Lupine (Lupinus Popsicle Series Mixed) In areas with cool summers, lupines are a prized perennial that attract butterflies and hummingbirds. https://gardenerspath.com/how-to/propagation/divide-perennials Division is a great way to replicate a perennials already in your yard, and a great way to … Spring and autumn are the recommended times, as those are the seasons when plants tend to establish new roots. How to divide. However with most other perennials I was nervous about killing the plants! Growing landscapes to help bees and other pollinators. Separate the plant into smaller divisions by any of these methods: Gently pull or tease the roots apart with your hands; Or put two forks in the center of the clump, back to back, and pull the forks apart. Encyclopedia of Perennials: A Gardener's Guide. Dividing or splitting a single perennial into multiple plants helps the plant perform better. The plants are listed in alphabetical order by common name. Plants divided in spring have the entire growing season to recover before winter. University of Minnesota Press, Minneapolis, MN. Root systems like those of Ajuga can be divided by hand, whereas others may require a sharp knife. Nau, Jim. The University of Minnesota is an equal opportunity educator and employer. Timber Press, Portland OR. Water the soil a day in advance if the area to be worked on is dry. Beyond creating new plants, dividing is the perfect way to keep plants healthy and under control. Generally speaking, crown division is performed after flowering. Advertisement Dividing involves splitting an established plant into several pieces, each of which has a section of the roots. “Usually, the plants let you know when they need to be divided,” said Brister, “OR if your friends want some of your plants, then divide away!” Healthy plants do their best to stick around. Plants with fleshy roots, such as heucheras and primulas, are best divided regularly once the plants become lax and leggy. Perennials are plants that grow back each year. Keep in mind that each perennial’s root type determines how it likes to be cut and divided. Because every perennial has a preferred way to be divided, use this handy chart to help you know what time of year to divide, how to divide it and a handful of other helpful tips to ensure your success. Plants that have multiplied into big clumps can take over and compete with others for moisture and nutrients in the soil. Julie Weisenhorn, Extension educator and Molly Furgeson. Or simply divide them for the sake of having multiple of your favorite plants! Perennials are plants that grow back each year. The … Iris can stop blooming if not divided routinely. Perennials like this lungwort can be divided for extra plants or to improve the health of the plant. Ball Publishing, West Chicago, IL. Dividing Additional Perennials For nearly all other perennials, begin by cutting any spent blooms and stems back to the ground base. Timber Press, Portland, OR. Don’t forget spring bulbs, which can be lifted and prised apart as the foliage dies down. © Each division should have three to five vigorous shoots and a healthy supply of roots. 1998. Some can be invasive unless divided frequently. Plants should be divided when they're dormant, in late autumn or early spring. 2021 These can crowd out their own centers. Smaller leaves and shoots will not suffer as much damage as full-grown leaves and stems. All rights reserved. … http://www.gardengatemagazine.com/articles/how-to/divide/how-to-divide-45-favorite-perennials/, How to Propagate Rex Begonias from Leaf Cuttings, Divide in early spring or after it stops blooming in late summer to early fall; will bloom better with division every 2 to 3 years, Easy to divide; needs to be divided every 1 to 2 years to keep plants vigorous, Divide in summer when flowering is over, at least 6 weeks before frost so plants have time to get established, Spreads quickly; easy to divide; for ease of handling, divide in spring as foliage is emerging, Easy to divide; divide every 3 to 4 years; for best appearance next season, don’t make divisions too small, Easy to divide; roots usually pull apart easily by hand; divide every 3 to 4 years, Divide as foliage goes dormant in the heat or mark plant location; roots are brittle, handle carefully, Divide in late spring to early summer, after blooming; will reseed but divide to keep specific cultivars true. Perennials divided in late summer/early fall should be mulched with several inches of straw or pine needles in mid to late November. The general rule is that spring and summer flowering plants need to be divided in the fall, and everything else should be divided in the spring. have carefully selected these products for their usefulness and quality. 1996. Perennials that have occupied the same space for too many years can begin to fail. 1993. Heger, Mike, Lonnee, Debbie & Whitman, John. Some perennials that do best when divided in the fall include garden peony, garden phlox, bearded iris, Siberian iris, and Asiatic lily. Here are some supplies and tools we find essential in our everyday work in the garden. They can usually can be pulled apart by hand, or cut apart with shears or knife. This allows for a lot of root growth in the ground to get the division good and established before they set on a lot of top growth. Mulching helps prevent repeated freezing and thawing of the soil (during the winter months) that can heave plants out of the soil. Perennials that bloom in the spring, such as iris and poppies, can be divided in late summer to early fall. Keep these divisions shaded and moist until they are replanted. Hosta. Their scientific names are given in italics. Rain showers that generally come along with the early season are helpful. All rights reserved. Divide perennials on a cloudy, overcast day as dividing on a hot sunny day can cause the plants to dry out. To lift a perennial with minimal root damage, begin digging at its drip line. Dividing perennials, such as hostas, daylilies and peonies, is a great way to make the most of plants already in your garden. Since plants grow at varying rates, division may be used to keep plants that spread rapidly under control. Restricted airflow can lead to diseases. When perennials are divided, there is more space for roots to grow and absorb nutrients and water. Some plants don't like to be divided or moved at all. Gardening with Perennials Month by Month. Ball Perennial Manual: Propagation and Production. blooming perennials should be divided sometime in April, as soon as new growth is detected. Alternately you can take a spade and try to chop off a section and leave a portion of the plant in its place. The rest of my perennials I started dividing purely by accident. Their root structures starts to become overcrowded. Plants with separate rosettes and fibrous roots, such as primroses, can be dug up and divided as their flowers start to fade, while hostas and other perennials with impenetrable root balls can be cut up with a sharp knife or spade. These diagnostic tools will guide you step-by-step through diagnosing a plant problem or identifying a weed or insect. Condiment perennials can also be divided … It is easy to locate the plants that need dividing. This rule is one that many gardeners break with regularity, experiencing relatively few problems. Perennials with fleshy roots such as peonies (. The difference is that some perennials, such as peonies, can go more than a decade without being divided, while others, such as chrysanthemums or ornamental grasses, like to be dug and separated every couple of years. You can also divide perennial herbs in the garden to expand your harvest. Perennials grace our gardens year after year with their variety of brilliant colors and unique foliage forms. Divide your perennials to keep plants vigorous, improve the health of their foliage and to increase the number of blooms. Numerous perennials can be divided and the pieces replanted with great success. Renew and Refresh Perennial Flowers Over time, most perennials need to be divided. Plants have stored up energy in their roots that will aid in their recovery. Dividing perennials is simple, easy, and an absolutely free way to create hundreds of new plants for your landscape. It depends on the plant and variety. 1994. Division works best on perennials that grow into colonies — groups where each new plant develops its own set of roots and leaves. Or simply divide them for the sake of … You can divide most perennials at any time of the year. University of Minnesota Extension discovers science-based solutions, delivers practical education, and engages Minnesotans to build a better future. Divide the perennial when it is not in bloom, so it can focus its energy on root and leaf growth. Growing Perennials in Cold Climates. Perennials such as asters, hostas, and yarrow can be divided easily with no hassle. Dividing the plants into smaller sections reduces this competition and stimulates new growth as well as more vigorous blooming. Download the PDF or bookmark the Dividing perennials spreadsheet to find information specific to 125 common perennials. Hosta plant. Dividing perennials can help manage the size of the plant. 10 Perennials You can Divide or Transfer 1. Divide when the plant is not flowering so it can focus all of its energy on regenerating root and leaf tissue. When is the best time to divide a bunch? Dig up the parent plant using a spade or fork. Regents of the University of Minnesota. You can offer these to family, friends, or transfer the plants to other areas in your garden or yard. Divide in spring; lift clump and cut into sections; Easy to divide; divide every 2 to 3 years to keep plants blooming and vigorous; discard dead central portion, Divide every 3 years or when flowering diminishes; discard the woody center and plant the edge pieces, A ring of foliage around a dead center tells you it’s time to divide; usually every 3 to 4 years is sufficient, Rarely needs to be divided; tough roots make dividing difficult; leave plenty of room around new transplants because the plant gets large, Divide every 3 to 5 years to keep plants vigorous, Rarely needs to be divided; if you do divide it, do it in early spring while plants are in bloom or right after they stop flowering, Easy to divide in early spring when foliage is emerging; dividing large clumps later won’t harm plants but leaves them lopsided for the summer, Rarely needs to be divided, so divide only for new plants, every 7 to 8 years. Manual of Herbaceous Landscape Plants. Handle your plants… These are just a few examples of plants that can be divided: Agapanthus, Anemone, Aster, Bergenia (elephant’s ears), Convallaria (lily-of-the-valley) Crocosmia, Dierama, Delphinium, Epimedium, Eryngium (sea holly), Euphorbia, Gentiana (gentian) Geranium, Helianthus, Hemerocallis (daylily), Hosta, Iris, Lychnis, Lysichiton, Lysimachia, ornamental grasses, Primula (primrose) Ranunculus (buttercup), … Most perennials can be divided every two to three years. Stipes Publishing Company, Champaign, IL. Follow these simple steps to reach healthy-looking perennials. In addition, perennials often increase in size each year, which means they can often be divided … Clump-forming perennials, such as hardy geraniums, can be divided if you want more plants, or if the clump is overgrown – it can help to rejuvenate them and keep them flowering well. Other perennials that can be divided in spring include coreopsis, daylily, garden phlox, speedwell, and hardy zinnia. A hori hori digging … This plant grows bigger and bigger every year and is a great option for dividing into multiple, smaller plants. These homebodies include peonies and tree peonies, foxtail lilies, bleeding hearts, goatsbeard and butterfly milkweed. Facts on File, New York, NY. The following are examples of perennials you can divide at any point in the growing season, except for during the very hottest periods of the summer: Bugleweed ( Ajuga reptans ) … One rule of thumb for division is this: perennials that flower between early spring and mid June are best divided in early fall. All of these are signs that it is time to divide. Hosta are typically quite strong and thrive on being divided. Most plants are divided in either the early spring or fall, but some plants can be divided at any time in the year. Aka these are plants that make their own little … Plants with spreading root systems include asters, bee balm, lamb’s ear, purple cornflowers, and many other common perennials. What perennials can be divided? New growth is emerging and it is easier to see what you are doing. Perennials that flower after mid June are best divided in the spring. Wood, Christopher. You can leave the foliage in tact to help shelter the new plants as they re-establish their roots. Start at the drip line. After a few years in the garden, these perennials may start to produce smaller blooms, develop a 'bald spot' at the center of their crown, or require staking to prevent their stems from falling over. Similarly, most bulbs reproduce by forming clusters of new bulbs which you can divide in exactly the same way that you divide colony-forming perennials. Gardeners know that producing more plants is the main reason to divide your perennials, but not all perennials can be divided. This is particularly important in colder, northern climates. Preparing for Division Although dividing perennials is good for the plants in the long run, it's still a shock to their system. 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perennials that can be divided 2021