The next step in dividing iris plants is to divide the iris rhizomes. Steps to dividing your bearded irises. This will make it easier to see when you are breaking the clumps apart. These form a network that stores food produced by the leaves. Time to Divide Your Pacific Coast Irises – How To! 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 good news is that irises are easy to divide! Divide bearded irises every three to five years for optimum health. 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. More About Dividing Rhizomes of the Iris Plant. https://extension.psu.edu/dividing-irises This article applies to the bearded iris. The first sign that your iris needs to be divided will be decreased blooming. Look closely at your irises and you should see bulbous, fleshy rhizomes near the surface. Irises can become congested over time, which tends to inhibit flowering. Replant the rhizomes in a sunny location with well-draining soil in groups of one to three. Mine is pretty sad. But over their many, many years at Fine Gardening, they’ve researched and written a lot about this genus. of the member-only content library. Consider giving some to family and friends. Next, brush of as much dirt as possible from the iris rhizomes. Try not to pierce the rhizome with the fork. In many regions, July through August is the best time to dig, divide and transplant bearded irises. It's important to know which irises you are seeking to divide. It also keeps your irises healthy and producing, . 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. The ideal time to divide Iris is 6 to 8 weeks after bloom, it gives them time to store up some energy. Irises, by the way, are deer resistant, though the buds can get nibbled from time to time. 1. Perhaps it's time to divide and replant them. Thanks for the tips on dividing irises. Read on here for even more information. If you have noticed that your iris are blooming less than they usually do, you may need to transplant the iris in your garden. 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. Sign up to get all the latest gardening tips! First, trim all of the iris leaf fans back to about 6 to 9 inches tall (15 to 23 cm.). 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. This will allow the plant to re-establish its roots without having to support a large amount of foliage at the same time. Get complete site access to decades of expert advice, regional content, and more, plus the print magazine. Spread the roots out around the rhizome and then cover the roots and the rhizome with dirt. 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. Bearded iris should be divided in the late summer when the weather starts to cool. 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. Regular division allows you to keep on top of any disease issues that arise. Read on. Hopefully, this process will show you how to keep irises growing around your property for years to come. But I also have had success digging up and replanting right as they are done blooming. Recommendations for when to divide irises depend on the species. Most iris plants spread by means of underground stems called rhizomes. Follow these tips from horticulturists with Iowa State University Extension and Outreach to maintain a colorful, attractive iris planting. These can be discarded. Somehow Iris looks like a dainty sort, hence why dividing them feels intimidating. Late summer and early fall are the best times to dig up your bearded iris clumps and divide them. In doing…, "As a recently identified gardening nut I have tried all the magazines and this one is head and shoulders above the pack. Photo Wikimedia Commons: How's your iris garden looking? You must be a magazine subscriber to access this feature. This will keep your home booming with color all summer long. As you get closer to the center of the clump, you may find large sections of rhizomes that have no leaf fans. Bob Sussman 10/24/18. And August and September is the perfect time. My current plants are growing beneath cedars. ", Back in May, Fine Gardening committed to planning and planting a garden for Karen, an emergency department nurse. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. In Iowa, July or August is the best time to dig, divide, and transplant bearded irises. Large clumps can be divided to rejuvenate them if flowering has become reduced at the centre of the clump. Do NOT divide in the spring. The furthest thing from your mind may be spring flowers. Do not remove the roots from the rhizomes. 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. While bearded irises are easy-to-grow perennials, they need to be divided every 3 to 5 years. Divide clumps in autumn, or wait until after flowering has finished in spring 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. To have additional questions answered, contact Hortline at hortline@iastate.edu … Identify any diseased rhizomes, and lay those out separately. Bulbous irises form a more typical bulb which includes the Dutch iris and are planted in the fall with other bulbs. Thanks, again. Many gardeners wonder when is the best time to transplant iris and how should one go about moving iris from one place to another. How to transplant iris and are they shade lovers, starting when to divide iris a foot away from end... This year and to consider dividing them feels intimidating some energy the iris... Sign up for a step-by-step guide on how your bearded irises are grown at soil,! 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