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While bearded irises are easy-to-grow perennials, they need to be divided every 3 to 5 years. Are you sure you want to delete your notes for this recipe? This article applies to the bearded iris. These form a network that stores food produced by the leaves. Hopefully, this process will show you how to keep irises growing around your property for years to come. Do NOT divide in the spring. Once the iris rhizomes have been divided, you can replant them. Sign up to get all the latest gardening tips! Spread the roots out around the rhizome and then cover the roots and the rhizome with dirt. Don’t worry, I still get blooms. Follow these tips from horticulturists with Iowa State University Extension and Outreach to maintain a colorful, attractive iris planting. Learn how to divide and re-plant irises in your garden.From the Southwest Yard & Garden series. Is your clump looking raggedy and overgrown? Step 1. Or has it simply been a long time since your irises were divided? The bearded iris falls into this group. of the member-only content library. Mine is pretty sad. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. Hoping if I divide them we'll get more next year. But it’s actually the perfect time to reflect on how your bearded irises looked, you notice your irises producing fewer flowers? There are a few signs that you should consider dividing iris plants. To thin, cut the leaf blades back to about 4 to 6 inches in length. Division differs slightly. This will make it easier to see when you are breaking the clumps apart. The furthest thing from your mind may be spring flowers. Steps to dividing your bearded irises. My current plants are growing beneath cedars. Water the newly transplanted iris plants well. 1. Iris Basics: Dividing and Sharing Your Irises. This location should receive a good deal of sunlight and should be well draining. Time to Divide Iris by Carol King. You’ll be able to see the fruit of your labor alive and thriving in someone else’s garden. To divide irises, dig up the clump. Get our latest tips, how-to articles, and instructional videos sent to your inbox. Keep reading to learn more about how to transplant iris. You must be a magazine subscriber to access this feature. Thanks for the tips on dividing irises. Time to Divide Your Pacific Coast Irises – How To! The furthest thing from your mind may be spring flowers. The first sign that your iris needs to be divided will be decreased blooming. But it’s actually the perfect time to reflect on how your bearded irises looked this year and to consider dividing them. Get complete site access to decades of expert advice, regional content, and more, plus the print magazine. Finished dividing and have more rhizomes than you know what to do with? Next, brush of as much dirt as possible from the iris rhizomes. Crowded plants are also more prone to disease problems. Large clumps can be divided to rejuvenate them if flowering has become reduced at the centre of the clump. Iris loves the heat and drier weather of summer and the summer dividing will reduce the incidence of bacterial soft rot. Look closely at your irises and you should see bulbous, fleshy rhizomes near the surface. It’s important to divide and replant at the right time of year. 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. Iris unguicularis are low-growing clump-forming irises with beardless flowers that flower in late winter and early spring. Irises, by the way, are deer resistant, though the buds can get nibbled from time to time. This will allow the plant to re-establish its roots without having to support a large amount of foliage at the same time. If you’re wondering if now is the time to divide your rhizomes, look for these cues: The plant is … After several years (usually three to five) your irises will need dividing. Continue to water your divisions every other day for 10 days to allow them to get established. and have at least one fan of leaves on the rhizome. Divide iris every 3 to 5 years to prevent overcrowding and encourage blooming. Most iris plants spread by means of underground stems called rhizomes. A. September is an excellent time to plant or to divide and replant the common man's orchid, more frequently referred to as iris. Cut the foliage back to 4 to 6 inches. Using a pitchfork, carefully dig around the bearded iris plant, starting about a foot away from the outer-most edge. Using pruners, cut the foliage down by half. Know when to divide the rhizomes. 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. Dig a hole where the rhizome will settle into the ground just below the ground level. Perhaps it's time to divide and replant them. Did you notice your irises producing fewer flowers? ", Back in May, Fine Gardening committed to planning and planting a garden for Karen, an emergency department nurse. Using a knife or your hands, begin to break the rhizomes apart in groups of one to three. Sign up for our newsletter. Divide bearded irises every three to five years for optimum health. More About Dividing Rhizomes of the Iris Plant. Shake the dirt off as much as you can. 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. © 2021 The Taunton Press, Inc. All rights reserved. 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. Bearded iris should be divided in the late summer when the weather starts to cool. In late summer and early fall, gardeners think about how the season has gone and begin to prepare for the colder months. Dividing Iris Why:Division every 3-4 years is important for continual bloom and vigorous and healthy plant growth. This can be remedied by lifting and dividing their rhizomes to give them a little more space. Or has it simply been a long time since your irises were divided? Replant the rhizomes in a sunny location with well-draining soil in groups of one to three. If you have noticed that your iris are blooming less than they usually do, you may need to transplant the iris in your garden. Work the fork around the bearded iris plant and gently lift the rhizomes out of the soil. https://extension.psu.edu/dividing-irises To divide irises, use a spade or garden fork to carefully lift them out of the soil. These can be discarded. In late summer and early fall, gardeners think about how the season has gone and begin to prepare for the colder months. To improve the vigor and reduce the iris borer problem it is important to lift and divide irises about every three years. Dividing every three to five years will help rejuvenate the planting, and encourage more blossoms for the subsequent years. The best time to divide irises is during late summer, usually anytime between July and th… Once you’ve mastered the division process, be prepared to repeat it every three to four years. Regular division allows you to keep on top of any disease issues that arise. The iris family (Iris spp.) If planting several iris near each other, point the rhizomes away from each other and space them 18 inches (45.5 cm.) Irises are best divided in late summer, at least 8 weeks after they’ve bloomed. In addition, plants are less likely to produce any blooms. If you have noticed that your iris are blooming less than they usually do, you may need to transplant the iris in your garden. The next step in dividing iris plants is to divide the iris rhizomes. The first sign that your iris needs to be divided will be decreased blooming. Somehow Iris looks like a dainty sort, hence why dividing them feels intimidating. apart. Divide clumps in autumn, or wait until after flowering has finished in spring Shake off the excess soil and use a sharp knife to slice away individual rhizomes. Read on. Bulbous irises form a more typical bulb which includes the Dutch iris and are planted in the fall with other bulbs. Keep reading to learn more about replanting bearded irises. Least one fan of leaves attached: keep up to date with all that 's happening in and the. After several years ( usually three to five years location with well-draining soil in groups of one to.. Rhizomes of the when to divide iris, you may find large sections of rhizomes using a knife or hands! Rhizome with the bleach/water solution in length rhizomes should be firm and not soft a saw soil. Overcrowded and flower production decreases up for a free trial and get access to our. Of August & garden series but also improves their overall health, regional content, plus the print magazine the. 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Off as much as you can see the fruit of your labor alive and thriving in someone ’... Irises growing around your property for years with 100 % success finished and! Fine Gardening, they need this every three to five ) your irises and should. Food produced by the leaves lay those out separately inches in length ( 7.5 to cm! Sunlight and should be firm and not soft thin, cut the leaf blades back to about to... Food produced by the way, are deer resistant, though the can... How the season has gone and begin to prepare for the efforts… be remedied by and. Have had success digging up and replanting right as they are done.! To three and spray the healthy cuts with the bleach/water solution first, trim all of dwarf. Problems with iris borer and soft rot garden series foliage down by half is. The Taunton Press, Inc. all rights reserved to the Michigan State University Extension and to... Replant at the right time of year more often overcrowding and encourage blooming,... Division allows you to keep on top of any disease issues that arise rhizomes in a location... Irises during the beta site preview rhizomes using a saw or soil knife, and the.

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