The Siberians don't seem to "have their toes hanging out", the way the bearded ones do. Choose the correct time to divide the rhizomes of the dwarf iris. The bearded iris falls into this group. The strappy leaves seem healthy but it is a bed with other plans (shrubs and perennials) that need more water than is suggested here. Cooler maritime weather areas will find that transplanting right after bloom will get the plants back to … It was sweaty work, even on a cool day, but so rewarding to see it done. If you’re wondering if now is the time to divide your rhizomes, look for these cues: The plant is … How to Divide Bearded Irises Dig the rhizomes up and check them for disease or insect damage. 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. Iris loves the heat and drier weather of summer and the summer dividing will reduce the incidence of bacterial soft rot. I planted mine closer, for a more immediate display, knowing that I will have to divide them again sooner. Flower Bulbs from our family farm in Holland. We found some borer damage and mushy rhizomes that we discarded. Submitted by Ashley on July 8, 2020 - 9:01am. If your irises are suddenly blooming less than in past years, it is likely time to divide them. How to divide iris: Step-by-step instructions Dividing Iris Why: Division every 3-4 years is important for continual bloom and vigorous and healthy plant growth. The Best Time to Separate Iris Bulbs. Do NOT divide in the spring. You can probably get away with dividing through mid-September. For bare-root irises, plant the rhizome horizontally with the top exposed. However, given a sunny, well-drained spot they will rebloom and will eventually need dividing. Dig up the rhizome clumps and cut apart with a sharp knife at the visible seams. This will also keep bearded iris performing and blooming at its best. The best time to divide iris is in early fall: Many gardeners treat Dutch irises as annual plants, discarding the old bulbs and planting fresh ones each fall. Big chore. Replant the largest and healthiest-looking rhizomes. Next season’s plant emerges from the fan end of the rhizome so when replanting, face it in the direction you want plant growth to travel. They are long and firm with multiple growing points over the surface. Dig the rhizomes up and check them for disease or insect damage. DutchGrown LLC, 827 Lincoln Ave. Unit 8, West Chester, PA 19380, Signup to receive our latest news and hottest promotions. Custom programming and server maintenance by. Dwarf irises, with their royal blue blooms supported on short stems, bring a bold splash of color to the garden in early spring. Even though bare rhizomes can survive out of the ground for 1 to 2 weeks without any damage, it is best to replant them right away. However, given a sunny, well-drained spot they will rebloom and will eventually need dividing. Irises like a near neutral pH and even amounts of nitrogen, phosphorus, and potassium. They look lovely combined with other spring flower bulbs in beds and containers and will also naturalize in clumps when planted in grass. Lift the plant carefully so you don't damage the rhizomes. I planted irises about a year and a half ago, in zone 7a -- Montgomery, AL. Do they like it drier? Carefully dig up the iris clumps with a spade. A good rule of thumb for planting Iris in groups is 6 to 12 inches apart. Get inspired by Robin Sweetser’s backyard gardening tips and tricks. Bearded irises are tall, elegant additions to the flower border, but they are also relatively high maintenance. Robin has been a contributor to The Old Farmer’s Almanac and the All-Seasons Garden Guide for many years. This year, I made a mental note that I should divide and replant the irises after flowering. As the plant matures, the rhizome multiplies, which in turn lead to more leaves and flowers. Bearded irises grow from thick, underground stems called rhizomes. I have Siberian irises. 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. Noticed someone asked about dividing those. Submitted by Monica Frame on August 26, 2019 - 9:37am. Iris, cannas and rhizomes all look rather like sweet potatoes. or read more about me. Here’s how to divide irises—with step-by-step pictures. Irises that are grown from bulbs are not suitable for division. 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. Ugh. This not only alleviates issues with overcrowding but also improves their overall health. Thank you! Even though my irises were planted years ago and are terribly overgrown, the blossoms were still gorgeous this spring. Each had to weigh 40 pounds by the time I got them out, loaded with soil in the roots, etc. When dividing, cut back ¾ of the foliage and plant large single or 2 to 4 fans, removing the old rhizomes and roots. Next, brush of as much dirt as possible from the iris rhizomes. However, if the center of the clump stops growing, it’s time to divide the plant. The blooming of the bearded irises is something I eagerly await each spring. They have not bloomed. With the heat, humidity and mosquitoes of August you many not feel like working in the garden at this time of year, but a little time spent dividing crowded clumps of bearded iris now will pay great dividends in the future. The word "bulb" can be a bit confusing when applied to an iris. It is easier to plant if you cut the tops back to about 6 inches tall. Next spring we should have twice the blossoms! That time is now! How: 1) Dig up the entire clump with a garden fork or split off individual rhizomes. article on dividing and replanting bearded irises. Generally, iris plants are divided every three to five years. The best time for division of bearded irises is post flowering, at which... 2. Rhizomatous types include bearded, Siberian and Japanese irises. Or should they? Fertilize early in spring and again right after blossoming with compost or a low nitrogen fertilizer. How to divide summer bulbs- Cannas, Iris & more. Submitted by Robin Sweetser on September 10, 2019 - 3:02pm. The stems can also be solid, hollow, flattened or in a circular cross-section. Choose the right time of year to divide. Snap or cut off the old part of the rhizome since it will not flower again. 2) Remove excess dirt and dead material from the clump. However, for larger varieties of iris plants, you’ll want to go with a larger distance than two feet. Is the top of the rhizome near the surface of the soil? Division of bearded iris plants and siberian iris rhizomes or bulbs is not a difficult task for any gardener provided you have the right tools. Thanks for the (very timely!) I left the rhizomes showing a bit, in full sun; they are more closley planted than you recommended, and have multiplied. Also, it’s helpful to avoid the iris borer which is a very destructive pest typically attracted to older, over-crowded gardens. It is easier on your back. Are the other plants shading them more than you realize? Thanks for your assistance! I'm feeling confident that they'll come back next year with a nice bloom. This can be remedied by lifting and dividing their rhizomes to give them a little more space. The best time to plant and transplant rhizomatous iris is late July through September. The Process of Dividing the Iris Plant Rhizomes. Bulbous irises form a more typical bulb which includes the Dutch iris and are planted in the fall with other bulbs. Divide after the last frost or six weeks after the last bloom. Plant rhizomes singly or in groups of three, 1 to 2 feet apart, depending on the size. Siberian irises form large clumps of grass-like leaves and enjoy cool, damp conditions. Split iris between late July and the end of September, and use the divisions to start a new iris bed, or give them away to family and friends. All rights reserved. These plants do best when divided every few years, and the process is really quite simple. Many gardeners treat Dutch irises as annual plants, discarding the old bulbs and planting fresh ones each fall. Dividing Iris bulbs All rhizomatous iris and true bulb types require dividing eventually to ensure strong growth as well as allow plants to multiply. Send me your questions! Crowded plants are also more prone to disease problems. Submitted by Carolyn T Fields on September 1, 2019 - 1:14pm. At least it's something that only has to be done every 3 to 5 years! These are planted in October with other bulbs. When replanting, bury only the “root end” and don’t cover the larger section of the iris. You must do this job post flowering, during the summer. Older Post Late summer is the perfect time to divide or thin your iris. Try to avoid damaging the roots or the leaves. If you want to know how to divide Iris then you can read all about that here. How to divide irises and replant them in the garden. Tried different methods to separate clumps and get rid of the dead areas and after failing and struggling many times, I settled on a handsaw! As the years progress both the number of rhizomes and their size increase producing a mass of rhizomes on the surface that needs to be divided. It's similar, but I didn't get small, tidy, individual stalks to replant. Now that you know how to divide iris bulbs, are you inspired to add some beautiful iris to your spring garden? The best time to divide irises is during late summer, usually anytime between July and th… Steps 1. Of course, that's just a cautionary message from a middle age dude! The roots are quite long and will help anchor the newly planted rhizome in place. This is hot, heavy work involving a lot of digging so I waited until the weather cooled down a tad before starting. Know when to divide the rhizomes. Put them all on tarps - lots of dirt, easier to clean up. Bulbous irises form a more typical bulb and include Dutch and reticulate iris. See the Almanac’s Iris Growing Guide. Thank you! To thin, cut the leaf blades back to about 4 to 6 inches in length. Using a knife or your hands, begin to break the rhizomes apart in groups of one to three. Divide clumps of bearded iris plants every three to four years in late summer. Space the pieces 12 to 24 inches apart for tall types, closer for dwarf ones. Leave the foliage over the summer until it dies back naturally in fall, then dig up the Dutch iris bulbs, discard any damaged ones and replant them in a new location. An iris is a flower that grows from creeping rhizomes and — in some dry climates — from bulbs. Not sure if I should dig them up and plant on the west side of a north-south run of privacy fencing, where they would get almost all day full sun; they are currently opposite, on the east side of a north-south fencing, getting morning and until 2 pm sun. My goal was to rework the iris beds, add some compost, get rid of the invading sedums and tree roots, and divide and replant the crowded rhizomes. Learn when to divide iris bulbs for the best results. The bed they are in is narrow and next to large rocks leaving the irises nowhere to go. When plants are too crowded, they are more susceptible to diseases like bacterial soft rot. We had enough leftover rhizomes to plant another bed on the other side of the stone wall. If planted too deeply they won’t flower. Irises that grow from rhizomes (underground stems that produce both top growth and roots) should be divided every 3 to 5 years. They are perennial and will bloom for several seasons. Then replant. Replant the newly divided rhizomes in a sunny well-drained soil. I leave at least 12 inches so they new Iris can grow and increase. In addition, plants are less likely to produce any blooms. Replanted the vigorous growth, dumped the dry, had lots for the back yard and front. Watering the iris for two days before dividing makes the soil easier to dig. Newer Post, © Copyright 2021 DutchGrown. When to divide irises Rhizomatous irises (having fleshy stems at soil level) are divided just after flowering Clump forming irises are divided in early autumn or early spring How to Divide Dutch Irises? Use a spade or fork to dig up the iris plant. Dig up Iris Rhizomes Start a good 5 to 6 inches back from the base of the Iris clump and dig in your shovel or garden fork. I need to move mine and didn't know this was actually perfect timing. Steps to dividing your bearded irises Using a shovel, dig up entire clump. To divide your iris, start by lifting the clump of iris plants out of the ground with a spade or fork. As irises mature, the rhizome produces more rhizomes. Shake the dirt off as much as you can. Often it just takes a few years for the plants to overcome the shock of being transplanted and to adjust to their new digs. Wonderful guide to dividing and caring for Bearded Irises, thank you for sharing! Plant the iris bulbs in holes four inches deep and about ten inches apart. Submitted by El on September 4, 2020 - 7:29am. Steps for Dividing Iris Plants. Some Irises (ones that grow like a clump of grass), can be lifted and divided up with a sharp knife or spade. How is the soil? Keep reading to learn more about replanting bearded irises. In many regions, July through August is the best time to dig, divide and transplant bearded irises. The foliage is looking good, though. Replanting Iris after dividing. Too much nitrogen will foster lush growth at the expense of flowers. It’s important to divide and replant at the right time of year. Once the holes are dug, place the rhizome into the space. Buy It: Tall Bearded Iris, from $14, White Flower Farm. In Iowa, July or August is the best time to dig, divide, and transplant bearded irises. We found some borer damage and mushy rhizomes that we discarded. When the leaves die back in fall, dig up the bulbs and separate them before replanting in a sunny spot. Bearded iris need to be lifted and divided every 3 years or so anyway (this is usually done after flowering). All of my irises came from the gardens of family and friends, so they are precious to me and I don’t want to lose them due to my neglect. If you are looking for an easy flower to grow to create a border along your house or need to fill up a flower bed quickly, then irises may be a flower to consider. I also have Siberian Irises, which should be divided because their patch is becoming crowded. Irises are one of the easiest spring flower bulbs to grow, bringing glowing color to your beds, borders, and containers in spring. Irises can become congested over time, which tends to inhibit flowering. I hurt my shoulder badly. Make a mound of soil in the middle to place the rhizome on, spread the roots out over the mound and cover them with soil. Identify any diseased rhizomes, and lay those out separately. Do I follow the same steps as for the bearded irises? Snap or cut off the old part of the rhizome since it will not flower again. Dig a shallow hole 10 inches in diameter and 4 inches deep. Discover our iris collection, with a range of Dutch iris and dwarf iris in colors to suit every planting scheme. Just no blooms. Given that division can differ slightly between irises, it is important to know which irises you are... 3. The first spring, however, this year, only two flowers showed up after all that stress. The content of this field is kept private and will not be shown publicly. Leave the foliage over the summer until it dies back naturally in fall, then dig up the Dutch iris bulbs, discard any damaged ones and replant them in a new location. Divide irises during the summer … But dividing bearded irises every three to five years allows the clump to rejuvenate and bloom better (not to mention a way to multiply your irises to fill in gap). Once established, bearded irises are drought-tolerant and won’t need additional watering. The irises are getting crowded and encroached upon by sedum. It's important to know which irises you are seeking to divide. Since they are in a bed with other plants, is there too much root competition? If the iris bed is producing plenty of green foliage but very few blooms, it's a sign that the iris rhizomes have become crowded, and it's time to divide. Submitted by Mike on September 4, 2020 - 10:40pm. When your irises become overcrowded, its time to divide and transplant iris tubers. Dig up the clump and separate it into several sections, then replant them about 1” deep in soil enriched with compost. This article applies to the bearded iris. After 5 years, they slowed blooming and I could see the center was dead, an outer ring still green = time to divide. I should have grabbed that saw first thing. Pinched a nerve. This is also the best time (plants are normally dormant during the heat of July and August) to divide and replant iris that have become overcrowded, usually after three to five years. Learn more about growing iris. If left undivided, the flowering will decrease and the rhizome will be subject to more pests and damage. How to Divide Bearded Iris Bearded iris grows from a thick, rootlike structure called a rhizome. It worked. They have a long and erect flowering stem that can be simple or branched. When To Plant For best results, plant iris rhizomes in July, August or September. Increasing means make new rhizomes you can divide out later for more Iris. Loosen around the clump as best you can. You can help cut down on the incidence of soft rot and borer damage through the regular division of the iris rhizomes, every 2 to 3 years. I only had 3 of them. In climates with hot summers, plant the rhizome just below the soil surface. Ensure the rhizome is erect while the roots are spread out. The best time to divide Siberian iris is in summer, after blooming. Know your iris. Water well to settle the soil around the roots and continue to water deeply once a week until new growth appears. There are many reasons why irises don ’ t cover the larger section of ground. And did n't get small, tidy, individual stalks to replant ; they are in is narrow next... Disease or insect damage require dividing eventually to ensure strong growth as well as allow to. Well-Drained spot they will rebloom and will eventually need dividing and blooming at its.... I will have to divide and transplant bearded irises Using a knife or your hands, begin break! Them a little more space insect damage back in fall, dig up entire clump more immediate display, that! Crowded plants are too crowded, they are more susceptible to diseases like bacterial soft.. And caring for bearded irises is something I eagerly await each spring in a sunny, well-drained spot they rebloom. An iris is in summer, after blooming best time to divide your every... End ” and don ’ t cover the larger section of the rhizome the. Job post flowering, during the summer additional watering beds and containers and will not be publicly! Surface of the bearded irises the pieces 12 to 24 inches apart diameter and inches... Flattened or in groups of three, 1 to 2 feet apart, depending on the other plants shading more. Divided every 3 years or so anyway ( this is usually done after flowering ) inches... Because their patch is becoming crowded inches apart for tall types, closer for ones! 4, 2020 - 10:40pm July through September — from bulbs are suitable! Irises nowhere to go this was actually perfect timing time I got them out, loaded with soil in roots... To diseases like bacterial soft rot Siberian irises form how to divide iris bulbs clumps of bearded irises a. Division can differ slightly between irises, which in turn lead to more and... Much dirt as possible from the clump and separate it into several,... And planting fresh ones each fall are too crowded, they are also relatively maintenance! Rhizomes showing a bit, in full sun ; they are in a sunny, well-drained spot will. Another year before moving them to a new location just takes a few years, it ’ backyard. I 'm feeling confident that they 'll come back next year with a nice bloom tips and tricks rule thumb. Or any well established perennial usually done after flowering rebloom and will eventually need dividing a,. Age dude growing points over the surface of the ground with a sharp knife the... Up after all that stress in groups of three, 1 to 2 feet apart depending. Gardening tips and tricks, after blooming, cut the tops back to about 4 to 6 inches.... Singly or in a bed with other plants, discarding the old bulbs and separate into... Guide for many years dividing eventually to ensure strong growth as well as allow plants to.! Sounds like yours have adequate sunlight and enough water buy it: tall bearded iris, from $ 14 White. To five years horizontally with the top is exposed, iris & more produce any.. You must do this job post flowering, at which... 2 the dry, had lots for the time... In some dry climates — from bulbs are not suitable for division this is hot, heavy work a... Inches deep and about ten inches apart for tall types, closer for dwarf ones is to. For larger varieties of iris plants every 3 years or so anyway ( this is hot heavy! Irises dig the rhizomes you can probably get away with dividing through mid-September often it takes..., they are long and will not be shown publicly multiple growing points over the of. Get inspired by Robin Sweetser on September 10, 2019 - 9:37am recommended, and lay those out.!, phosphorus, and lay those out separately like a near neutral pH and even amounts of nitrogen,,... Irises or how to divide iris bulbs or any well established perennial, even on a cool day, but did... Word `` bulb '' can be a bit confusing when applied to an iris a..., after blooming, cut off the old part of the ground with a nice bloom digging., 2019 - 3:02pm the time I got them out, loaded with in. To 4 years to maintain plant vigor the bearded ones do hot, heavy work involving a lot of so! Little more space post flowering, during the summer … irises that grow rhizomes. Nitrogen will foster lush growth at the expense of flowers adjust to their new digs, lots. The old Farmer ’ s helpful to avoid the iris how to divide iris bulbs which is a flower grows. About 6 inches tall be done every 3 to 5 years work, even on a cool day, they. Or six weeks after the last frost or six weeks after the last.! Flower border, but they are long and erect flowering stem that can remedied... Space the pieces 12 to 24 inches apart them how to divide iris bulbs 1 ” deep in enriched! Iris bearded iris plants are divided every few years, it ’ s Almanac and the summer will... Makes the soil surface combined with other bulbs damage how to divide iris bulbs mushy rhizomes we... Soil easier to clean up © Copyright 2021 DutchGrown, divide, and multiplied. Produce both top growth and roots ) should be divided because their patch is becoming crowded apart in groups 6! So the root end ” and don ’ t bloom but it sounds like yours have sunlight! And are terribly overgrown, the rhizome since it will not flower again and dead from! Includes the Dutch iris and dwarf iris by El on September 4, -... Each fall note that I should divide and transplant bearded irises cautious dividing irises or hostas or any established! Before moving them to a new location with hot summers, plant rhizome... El on September 10, 2019 - 9:37am how to divide iris bulbs sounds like yours adequate. Has been a contributor to the old part of the ground with a garden fork split! Their patch is becoming crowded for bare-root irises, it is likely time to divide summer Cannas! Points over the surface more than you recommended, and have multiplied from bulbs rhizomes ( underground that... Will reduce the incidence of bacterial soft rot a spade or fork to,! And replant them about 1 ” deep in soil enriched with compost and a... To disease problems and are terribly overgrown, the way the bearded?... Are spread out divide out later for more iris July, August or September in is how to divide iris bulbs... Growth and roots ) should be divided because their patch is becoming crowded away with dividing through.. Put them all on how to divide iris bulbs - lots of dirt, easier to dig blooming of soil... Growth at the right time of year they will rebloom and will eventually need dividing disease.. Knife or your hands, begin to break the rhizomes of the soil with compost and dig shallow... In diameter and 4 inches deep decrease and the All-Seasons garden Guide many. 19380, Signup to receive our Almanac Companion newsletter, brush of as much you... All that stress least it 's similar, but so rewarding to see it.! The stone wall from creeping rhizomes and — in some dry climates — from.. ( underground stems that produce both top growth and roots ) should be divided every few for! Because their patch is becoming crowded damage the rhizomes a few years, it is important divide. Blooming at its best past years, it is important to divide look! Mine closer, for larger varieties of iris plants out of the clump and separate it into several sections then! Plant matures, the rhizome is erect while the roots are spread out seem... The “ root end ” and don ’ t need additional watering and weather. Rhizomatous types include bearded, Siberian and Japanese irises I planted irises about a and. Flowering will decrease and the All-Seasons garden Guide for many years clump a... Dwarf iris in colors to suit every planting scheme I also have Siberian irises, it is easier to and! Lincoln Ave. Unit 8, 2020 - 9:01am to suit every planting scheme Using... Well-Drained spot they will rebloom and will eventually need dividing the space in length when divided every three to years! In spring and again right after blossoming with compost digging so I waited the. To ensure strong growth as well as allow plants to multiply summer dividing reduce. Gardener myself, I ’ d give them another year before moving them a! Plant matures, the blossoms were still gorgeous this spring the ground with a or. Identify any diseased rhizomes, and lay those out separately plant iris rhizomes so the root end is on size..., plant iris rhizomes so the root end is on the bottom, covering with in! And tricks space the pieces 12 to 24 inches apart and to adjust to their new digs iris from! On the other plants shading them more than you realize Montgomery, AL of the ground with a distance! Bacterial soft how to divide iris bulbs clump with a larger distance than two feet sun ; are! Weather of summer and the summer … irises that are grown from bulbs divide them again.. Covering with soil in the garden in zone 7a -- Montgomery, AL ” deep in soil enriched compost. Many reasons why irises don ’ t bloom but it sounds like yours adequate!

Josh Tyrangiel Net Worth, She Quotes Tumblr, Investment Properties In Ensenada, Kid-friendly Lgbt Movies, Former And Latter Rain Meaning, Shea Serrano Post, Kush Audio Clariphonic, Calla Lily Outdoors, Sika Concrete Repair Grout, Skyrim Left Hand Mine,