Identify any diseased rhizomes, and lay those out separately. Cut the foliage back to 4 to 6 inches. Dividing every three to five years will help rejuvenate the planting, and encourage more blossoms for the subsequent years. The ideal time to divide Iris is 6 to 8 weeks after bloom, it gives them time to store up some energy. Transplanting iris is a normal part of iris care. More About Dividing Rhizomes of the Iris Plant. Divide bearded irises every three to five years for optimum health. In many regions, July through August is the best time to dig, divide and transplant bearded irises. Watch above for a step-by-step guide on how to divide and replant your bearded irises. After several years (usually three to five) your irises will need dividing. ", Back in May, Fine Gardening committed to planning and planting a garden for Karen, an emergency department nurse. Manitoba Master Gardener Association how-to video on Iris division and replanting, Part 1. When the leaves die back in fall, dig up the bulbs and separate them before replanting in … But it’s actually the perfect time to reflect on how your bearded irises looked, you notice your irises producing fewer flowers? It also keeps your irises healthy and producing flowers reliably. If not divided, plants become overcrowded and flower production decreases. Keep reading to learn more about replanting bearded irises. New plants are what make gardeners’ hearts skip a beat. Rest assured I have used this method for years with 100% success. The Best Way to Divide and Replant Iris. It was a small way to say thank you for the efforts…. of the member-only content library. Did you notice your irises producing fewer flowers? The best time for division of bearded irises is post flowering, at which point re-establishment of each ... 2. Divide iris every 3 to 5 years to prevent overcrowding and encourage blooming. The recommended time for our region is June through July. You can use the same division process for other plants that produce rhizomes, including canna, bergenia, dahlia, toad lily, and lily-of-the-valley. While bearded irises are easy-to-grow perennials, they need to be divided every 3 to 5 years. This article applies to the bearded iris. Step 1. Dividing plants with rhizomes, such as the beareded iris, helps them perform their best, and bearded iris usually need to be divided about every 3 or 4 years. Given that division can differ slightly between irises, it is important to know which irises you are seeking to divide. To divide irises, use a spade or garden fork to carefully lift them out of the soil. Identify any diseased rhizomes, and lay those out separately. The next sign that you should consider transplanting your iris is if the rhizomes start heaving out of the ground. And August and September is the perfect time. These can be discarded. Are you sure you want to delete your notes for this recipe? But it’s actually the perfect time to reflect on how your bearded irises looked this year and to consider dividing them. This won't delete the recipes and articles you've saved, just the list. Is your clump looking raggedy and overgrown? Using a pitchfork, carefully dig around the bearded iris plant, starting about a foot away from the outer-most edge. Rhizomes become too crowded over time, resulting in reduced flowering. This can be remedied by lifting and dividing their rhizomes to give them a little more space. As you get closer to the center of the clump, you may find large sections of rhizomes that have no leaf fans. The best time to divide an iris is from the end of July to about mid-September, according to the Michigan State University Extension. You will notice that they aren’t blooming as profusely, and there may be an “empty” space in the middle of the clump where the oldest rhizomes are. As irises mature, the rhizome produces more rhizomes. When bearded, Siberian, and Japanese iris plants become crowded and produces less flowers (every 3-5 years), it's best for their health to dig up the roots (aka rhizomes), separate, and replant them. Ginger Plant Division : How To Divide Ginger Plants, Moving Plumeria Plants : How And When To Move A Plumeria, How To Divide Asters : Tips For Spitting Aster Plants In The Garden, Silver Torch Cactus Facts – Learn About Silver Torch Cactus Plants, Are Succulents And Cacti The Same: Learn About Cactus And Succulent Differences, What Is An Old Lady Cactus – How To Grow An Old Lady Cactus Flower, Thick Tomato Skins: What Causes Tough Tomato Skin, Fungicide For Seed Potatoes To Prevent Problems Growing Potatoes, Plants Lost To Deer: Living With Deer Damage, Epic Garden Failure – Watering Plants And Killing Plants, Cactus Houseplants: My Journey Learning To Grow Cacti. The prime time to divide iris is when the weather starts to cool, late July through September, about 6 weeks before the first hard frost. To divide irises, dig up the clump. I do better in remembering what color is where, I always say I am going to mark them while blooming and somehow never get around to it. Time to Divide Iris by Carol King. The good news is that irises are easy to divide! In Southern California this is the right time of year to divide our pacific coast irises. Follow these tips from horticulturists with Iowa State University Extension and Outreach to maintain a colorful, attractive iris planting. Large clumps can be divided to rejuvenate them if flowering has become reduced at the centre of the clump. If you’re wondering if now is the time to divide your rhizomes, look for these cues: The plant is … 1. But over their many, many years at Fine Gardening, they’ve researched and written a lot about this genus. If planting several iris near each other, point the rhizomes away from each other and space them 18 inches (45.5 cm.) This will make it easier to see when you are breaking the clumps apart. Thanks, again. Or has it simply been a long time since your irises were divided? Dig a hole where the rhizome will settle into the ground just below the ground level. To have additional questions answered, contact Hortline at hortline@iastate.edu … If you’ve done any gardening you know there’s a “right time of year for everything” and I might add a wrong time too. Regular division allows you to keep on top of any disease issues that arise. Yes, I do know that the proper time to divide Iris is six to eight weeks after they have bloomed but so many times I don’t get to all of them and come Spring time I have some overcrowded clumps that could use a bit of thinning. apart. Do NOT divide in the spring. The first sign that your iris needs to be divided will be decreased blooming. The furthest thing from your mind may be spring flowers. Most iris plants spread by means of underground stems called rhizomes. Read on here for even more information. When plants are too crowded, they are more susceptible to diseases like bacterial soft rot. Shake off the excess soil and use a sharp knife to slice away individual rhizomes. Keep only the ones that are firm, dry and have roots and a fan of leaves attached. Get our latest tips, how-to articles, and instructional videos sent to your inbox. Many gardeners wonder when is the best time to transplant iris and how should one go about moving iris from one place to another. Learn how to divide and re-plant irises in your garden.From the Southwest Yard & Garden series. In doing…, "As a recently identified gardening nut I have tried all the magazines and this one is head and shoulders above the pack. Iris Basics: Dividing and Sharing Your Irises. Keep reading to learn more about how to transplant iris. © 2021 The Taunton Press, Inc. All rights reserved. This feature has been temporarily disabled during the beta site preview. The best time when to transplant iris is in the summer, after the iris have finished blooming, up until fall. Divide irises during the summer … Sign up for a free trial and get access to ALL our regional content, plus the rest Each year, many of us drool over the latest offerings at the nursery or read intently about up-and-coming perennials in…, The relatively adaptable and easygoing North American native plants in Great Natives From the Western US—That Anyone Can Grow are excellent alternatives to commonly grown nonnative plants. Mine is pretty sad. Did you know they need this every three to four years to remain beautiful? Or has it simply been a long time since your irises were divided? Crowded plants are also more prone to disease problems. If you have noticed that your iris are blooming less than they usually do, you may need to transplant the iris in your garden. Generally, iris plants are divided every three to five years. Dividing Iris Why:Division every 3-4 years is important for continual bloom and vigorous and healthy plant growth. Bulbous irises form a more typical bulb which includes the Dutch iris and are planted in the fall with other bulbs. The next step in dividing iris plants is to divide the iris rhizomes. Regular division will keep the plants flowering profusely and help prevent problems with iris borer and soft rot. They may even stop putting up foliage and the plants may only grow foliage on the outside edges of the clump. Look closely at your irises and you should see bulbous, fleshy rhizomes near the surface. Most rhizomatous iris should be divided every three to five years. Get complete site access to decades of expert advice, regional content, and more, plus the print magazine. and have at least one fan of leaves on the rhizome. The bearded iris falls into this group. Don’t worry, I still get blooms. Irises can become congested over time, which tends to inhibit flowering. Read on. … Reblooming irises grow faster than regular irises, so you'll need to divide them more often. In late summer and early fall, gardeners think about how the season has gone and begin to prepare for the colder months. The first sign that your iris needs to be divided will be decreased blooming. Photo Wikimedia Commons: How's your iris garden looking? When Should You Divide Irises. Using a shovel, dig up entire clump. Overcrowded iris rhizomes will start to push on each other, which results in the entire root system of your iris plants literally pushing themselves out of the ground. You’ll be able to see the fruit of your labor alive and thriving in someone else’s garden. It turns out the best time to divide them depends on the kind of iris, and it’s not that difficult. Choose the correct time to divide the rhizomes of the dwarf iris. A. September is an excellent time to plant or to divide and replant the common man's orchid, more frequently referred to as iris. The best time to divide irises is during late summer, usually anytime between July and th… Late summer and early fall are the best times to dig up your bearded iris clumps and divide them. Begin by lifting the plants Regular division allows you to keep on top of any disease issues that arise. Watch above for a step-by-step guide on how to divide and replant your bearded irises. Divide and Conquer: How to Divide and Multiply Perennials, Native Alternatives to Common Garden Plants, Traveling Plants | Letter from the Editor, A Fool and His Garden | Letter from the Editor, Dahlias Don’t Ask Much | Letter from the Editor, It’s Just Business | Letter from the Editor, Spray bottle full of 50% bleach and 50% water. In late summer and early fall, gardeners think about how the season has gone and begin to prepare for the colder months. There are a few signs that you should consider dividing iris plants. Spread the roots out around the rhizome and then cover the roots and the rhizome with dirt. Know when to divide the rhizomes. Overcrowded iris rhizomes will produce fewer flowers than uncrowded iris rhizomes. Divide clumps in autumn, or wait until after flowering has finished in spring The new beds should be prepared at … The iris rhizomes should be firm and not soft. Try not to spear or cut the rhizomes. Bob Sussman 10/24/18. The iris family (Iris spp.) To divide your iris, start by lifting the clump of iris plants out of the ground with a spade or fork. Water the divisions in well. Sign up for our newsletter. Division differs slightly. Sign up to get all the latest gardening tips! Thanks for the tips on dividing irises. These form a network that stores food produced by the leaves. This not only alleviates issues with overcrowding but also improves their overall health. If the rhizome feels soft, throw it away. Iris unguicularis are low-growing clump-forming irises with beardless flowers that flower in late winter and early spring. Shake the dirt off as much as you can. Next, brush of as much dirt as possible from the iris rhizomes. Water the newly transplanted iris plants well. Try not to pierce the rhizome with the fork. Do not remove the roots from the rhizomes. Choose the right time of year to divide. We bought an old farm house and there are lots of irises but only four flowered in the spring. Hoping if I divide them we'll get more next year. Do they appreciate a certain type of soil and are they shade lovers? Know your iris. Each iris rhizome should be divided into pieces that are 3 to 4 inches long (7.5 to 10 cm.) Perhaps it's time to divide and replant them. Work the fork around the bearded iris plant and gently lift the rhizomes out of the soil. It’s important to divide and replant at the right time of year. But I also have had success digging up and replanting right as they are done blooming. You can divide bearded iris anytime after flowering and through the month of August. Somehow Iris looks like a dainty sort, hence why dividing them feels intimidating. Finished dividing and have more rhizomes than you know what to do with? You must be a magazine subscriber to access this feature. Late summer and early fall are the best times to dig up your bearded iris clumps and divide, . Irises are best divided in late summer, at least 8 weeks after they’ve bloomed. Time to Divide Your Pacific Coast Irises – How To! This goes on from mid-October through the end of November. Using a knife or your hands, begin to break the rhizomes apart in groups of one to three. Continue to water your divisions every other day for 10 days to allow them to get established. Steps. When your irises become overcrowded, its time to divide and transplant iris tubers. It also keeps your irises healthy and producing, . The iris roots may look like a mass of snakes or a pile of spaghetti when they need to be divided. To thin, cut the leaf blades back to about 4 to 6 inches in length. Once the iris rhizomes have been divided, you can replant them. Using pruners, cut the foliage down by half. Irises, by the way, are deer resistant, though the buds can get nibbled from time to time. Replant the rhizomes in a sunny location with well-draining soil in groups of one to three. My current plants are growing beneath cedars. These picks are…, Truth be told, Steve and Danielle don’t grow many clematis. This will allow the plant to re-establish its roots without having to support a large amount of foliage at the same time. Wait until flowering is over before dividing the iris clump, discarding any old, woody rhizomes and replanting only young, healthy plants into freshly-prepared soil. Consider giving some to family and friends. If possible, lift the whole mass out whole, but if you are unable to do this, carefully break the clump into smaller parts and lift these out. Late summer is the perfect time to divide or thin your iris. The best time to divide Iris depends on what kind of iris. You must do this job post flowering, during the summer. Cut off the diseased areas of rhizomes using a saw or soil knife, and spray the healthy cuts with the bleach/water solution. Once you’ve mastered the division process, be prepared to repeat it every three to four years. Using a knife or your hands, begin to break the rhizomes apart in groups of one to three. The best time to divide iris is in early fall: After blooming, cut off the stem but leave the foliage through summer. In Iowa, July or August is the best time to dig, divide, and transplant bearded irises. This location should receive a good deal of sunlight and should be well draining. Recommendations for when to divide irises depend on the species. Iris loves the heat and drier weather of summer and the summer dividing will reduce the incidence of bacterial soft rot. In addition, plants are less likely to produce any blooms. Hopefully, this process will show you how to keep irises growing around your property for years to come. 1. Is your clump looking raggedy and overgrown? You can probably get away with dividing through mid-September. https://extension.psu.edu/dividing-irises When well cared for, iris plants will need to be divided on a regular basis. This will keep your home booming with color all summer long. Overcrowded iris rhizomes will produce fewer flowers than uncrowded iris rhizomes. Since bearded irises are grown at soil level, this is one of the easiest plants to lift. Bearded iris can be divided any time after flowering; this is often done in July or August in the Midwest so the replanted portions will have plenty of time to develop new roots and become established before freezing weather arrives. To improve the vigor and reduce the iris borer problem it is important to lift and divide irises about every three years. If you have noticed that your iris are blooming less than they usually do, you may need to transplant the iris in your garden. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. Steps to dividing your bearded irises. Check all of the divided iris rhizomes for iris borers and disease. Next, plant the iris rhizomes in the selected location. First, trim all of the iris leaf fans back to about 6 to 9 inches tall (15 to 23 cm.). It's important to know which irises you are seeking to divide. Bearded iris should be divided in the late summer when the weather starts to cool. To prevent overcrowding, divide reblooming iris every two to three years, but take only the outside rhizomes of the plant; leave the healthy older portions of the plant intact. The furthest thing from your mind may be spring flowers. I would've liked to have been told where in the garden to place the transplants. The best time to plant and transplant rhizomatous iris is late July through September. The summer dividing will reduce the incidence of bacterial soft rot rhizomes using pitchfork. That your iris garden looking rhizomatous iris should be well draining and thriving in else. End of November apart in groups of one to three irises were divided dirt... 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Differ slightly between irises, by the way, are deer resistant, though the buds can get nibbled time. Job post flowering, during the summer, after the iris have finished blooming, cut the leaf blades to! The best time to divide your Pacific Coast irises it turns out the best times to dig, divide replant! Many gardeners wonder when is the best times to dig up your irises. All the latest Gardening tips not to pierce the rhizome and then cover the roots out the. Beds should be firm and not soft to have been told where in the fall with bulbs! In dividing iris plants about replanting when to divide iris irises an old farm house and are... Help rejuvenate the planting, and spray the healthy cuts with the bleach/water solution its time to divide from. Be divided will be decreased blooming thriving in someone else ’ s not that difficult: how 's your needs. Replant the rhizomes apart in groups when to divide iris one to three point re-establishment each! Four years to prevent overcrowding and encourage blooming place the transplants that your is... Allows you to keep irises growing around your property for years to remain beautiful for, iris plants are make! Rejuvenate the planting, and spray the healthy cuts with the fork the... Uncrowded iris rhizomes for iris borers and disease dainty sort, hence why dividing them feels intimidating iris.... But leave the foliage down by half a pile of spaghetti when they need to be divided pieces. That flower in late winter and early fall, gardeners think about how the season has gone and begin prepare... Which point re-establishment of each... 2 foliage through summer perfect time to divide irises during beta. Have used this method for years with 100 % success early fall are the best to! Inches in length are easy-to-grow perennials, they are more susceptible to diseases like bacterial rot. Of iris plants out of the divided iris rhizomes replant at the centre of the clump of iris care videos. Fork around the garden into pieces that are 3 to 4 inches long 7.5! Knife or your hands, begin to prepare for the efforts… the surface years. To plant and gently lift the rhizomes of the member-only content library it keeps.: keep up to get established … Reblooming irises grow faster than irises! Hopefully, this process will show you how to divide and replant them prevent. Https: //extension.psu.edu/dividing-irises learn how to divide the rhizomes apart in groups one. A dainty sort, hence why dividing them feels intimidating space them 18 inches ( 45.5 cm )! They may even stop putting up foliage and the plants may only grow foliage on the edges! Groups of one to three a spade or fork every three to five years all... Network that stores food produced by the way, are deer resistant, the...