A: It's great that you're taking the trouble to dispose of potentially invasive plants correctly. Rhododendrons are forgiving plants. Sunset Western Garden Book has an excellent chapter on dahlias, and OSU Extension has a good publication about growing dahlias. Pruning rhododendrons is not that different from pruning other types of flowers. This will mean that in years to come - just as the shrub is reaching its full glory, there will be a need to take drastic action by way of cutting down hard. Pruning large rhododendrons can seem like an overwhelming undertaking, but it doesn’t need to be. – Anne Schmidt, OSU Extension Master Gardener, Q: I have a small water garden and I need to safely dispose of excess salvinia, frogbit and water hyacinth. This is extreme pruning! Can I transplant them now? Most rhododendrons respond well to pruning. Mock orange. Note to readers: if you purchase something through one of our affiliate links we may earn a commission. All rights reserved (About Us). It would be very unfortunate to get any of these plants into our streams and wetlands. Subscribe to OregonLive. Regular pruning maintains the shrub size and prevents breakage during the winter months by managing the structure. You can cut back woody branches into areas where no leaves or lower twigs exist. I'd like to prune it way back, but I've heard that it won't bloom for years if we do. I'd rather keep the rhododendron but in a much smaller version, and I'm willing to forgo blooms for a year or two to do so. What this translates to is after the frost in fall when the plants die back. © 2020 Advance Local Media LLC. Take your time and prune over a couple of years. When to prune. As you have noted all are potentially invasive. Now what? This growth may need subsequent thinning out to select the strongest, best placed shoots. Here are some questions asked by other gardeners. Just follow the branch down to the last whorl of leaves you want to keep and cut just above those leaves. In rejuvenation pruning, you cut all of the stems down to the ground in one go. Pay special attention to watering. Red-stemmed dogwoods. Cutting back a rhododendron leaves little more than stubs… but don’t worry, it will grow back. Weigela. Bluebeard (Caryopteris) -- done annually. In rejuvenation pruning, you cut all of the stems down to the ground in one go. Most rhodos produce seeds and you can get your rhodo to concentrate on growth by removing the spent flowers. Prune right after the blooming has finished during the summer months of June and July. It's best to remove only 25-30 percent of the leaves in a year, as hard pruning will stimulate the plant to put out vigorous, messy growth. Prune your large rhododendron right after it finishes blooming. Do this soon after flowering before the new buds get big and set. Members of the Falconeri series (and 'tree' rhododendrons in general) will not produce new growth from bare wood; rhododendrons in the Thompsonii series also may resent pruning. Q: I love our deep red rhododendron, but it has grown so big that it blocks our front window completely. What do you recommend? Pruning rhododendrons requires accurate timing. PO Box 32125 RPO Westgate,Maple Ridge, BC. I prefer hand pinching. The second pruning action is for shape. Deciduous shrubs that respond well to rejuvenation pruning include: Lilac. A: Rhododendrons are impressive plants in a landscape. Pruning them too early will interfere with the budding for this season and pruning them too late will interfere with the next season. Fortunately, they are actually not too difficult to prune back. This is what I recommend to clients who wish to keep their rhododendrons from getting too big. Rejuvenation Pruning for Azaleas and Rhododendrons Because these are generally slow growing shrubs, there is often a tendency to plant them too close to other shrubs or obstructions. Deutzia. After a rhododendron shrub is severely cut back for rejuvenation, expect few, if any, flowers the next spring. Others that sprout abundantly should not be opened excessively to light. Forsythia. james@properlandscaping.com When spring arrives, after the last frost, dig holes at least a foot deep, place the tuber and fill the hole about a quarter full. […] I have also done renovation pruning on rhododendrons. The seeds would probably survive composting. The second type of rejuvenation pruning involves cutting off the trunk of the rhododendron shrub to 6 to 12 inches from the soil. If you take the pruning one step at a time and break up the project across a few days, it won’t seem so impossible. Maintenance pruning: Maintenance pruning is performed on rhododendrons just after they have flowered. Cutting back a rhododendron leaves little more than stubs… but don’t worry, it will grow back. Most rhododendrons respond well to pruning. Rejuvenation pruning, can be useful to reshape a plant. Witch hazel. Forsythia. The pruning method for each is different. Azaleas, which are also members of the Rhododendron genus, are much Spiraea. In fact, excessive growth may require a heavy pruning. That nature will forgive us for our transgressions. Gardening season is in full swing and there are lots of questions out there. Rejuvenation pruning involves the careful cutting back of each primary branch of the plant’s framework. Rejuvenation pruning removes most of the branches of the plant, initi- Some that do not sprout readily from old wood cannot be much improved. Bravely make big cuts if rejuvenation is required. It even creates more flowers as the shrub redirects its energy into flower production rather than overgrowth. By taking action you are doing your part to prevent their spread here in Oregon. Registration on or use of this site constitutes acceptance of our User Agreement, Privacy Policy and Cookie Statement, and Your California Privacy Rights (each updated 1/1/20). Pruning is spread over two or three years to gauge response or maintain the natural shape. If you have an overgrown shrub that is no longer flowering, try rejuvenation pruning in early spring by cutting all the stems back to the ground. The Art of Pruning: Timing and Techniques Pruning is one of the best things you can do for your shrubs. Get answers from Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service. This may delay flowering for several years but will result in a more manageable shrub. Rejuvenation pruning consists of cutting down a plant to about 6-18 inches. With a rhododendron or azalea that lives up to their reputations as the … Just be careful so you don’t injure the buds below. The instructions below are specific to rhododendrons, and will ensure that you prune them such that you increase their beauty and are still able to enjoy them season after season for some time to come. This will mean that in years to come – just as the shrub is reaching its full glory, there will be a need to take drastic action by way of cutting down hard. In this case we employ pruning action three: rejuvenation, which sounds better than renovation. How do you treat a stem canker in a maple tree. Fortunately, they are actually not too difficult to prune back. Mock orange. By pruning just above viable dormant buds, new healthy growth can be directed to obtain a more desirable shape. This makes neat little mounds of twigs that will explode with new growth come spring. – Josephine County, A: You must wait until the current plantings have “rebuilt” the necessary strength in the tuberous roots to bloom again. The larger-leafed rhododendrons have many dormant buds that can be forced into new growth. Plants that respond well to rejuvenation include, forsythia, lilac, and spirea. – Anne Schmidt, OSU Extension Master Gardener, Dahlia breed: Scott's Caldera Katie Currid/The Oregonian LC-LC-, Q: I have several dahlias in my yard that grow well but have little to no bloom. Cutting back a rhododendron leaves little more than stubs… but don’t worry, it will grow back. I have considered setting them out to dry prior to composting but wonder if the seeds would still be viable. Weigela. Photo: properlandscaping.com. – Multnomah County. My husband advocates pulling it out and planting an azalea there. I plan on doing some rejuvenation pruning and cutting it back so it is only about 6 feet tall. This will mean that in years to come - just as the shrub is reaching its full glory, there will be a need to take drastic action by way of cutting down hard. OSU Extension faculty and Master Gardeners reply to queries within two business days, usually less. Rejuvenation pruning removes most of the branches of the plant, initi- Large clumps of tubers on one plant should be divided. So out came the saw as soon as the request was made. Witch hazel. A tip I have seen time and time again is: when you are doing some rejuvenation pruning, don’t forget to … If you look closely at the bark you'll see tiny pink buds everywhere. Many rhododendron spe-cies and hybrids can be severely pruned and come back as good as new. Rejuvenation pruning consists of cutting down a plant to about 6-18 inches. One is the removal of spent flowers (trusses) and any diseased or dead wood. Rejuvenation pruning, can be useful to reshape a plant. The rejuvenation prune. This may delay flowering for several years but will result in a more manageable shrub. If digging in fall, remove the plants carefully, shake off as much soil as possible, allow the tubers to dry for a few days and then store them in a frost-free, dry and somewhat dark place. If you take the pruning one step at a time and break up the project across a few days, it won’t seem so impossible. Prune your large rhododendron right after it finishes blooming. Done every three to five years, this extreme method of pruning can indeed rejuvenate an overgrown or misshapen shrub, just as the name implies. Pruning, when required, is generally carried out in mid to late spring. Photo: properlandscaping.com. What’s yours? A tip I have seen time and time again is: when you are doing some rejuvenation pruning, don’t forget to … If your location does not regularly reach the low 20s freezing weather, you can leave them in the ground until spring. Here is one example from my work site. When did you last dig and divide, for example? Best case: cut above a cluster of latent buds. It will take a couple of years and may decrease blooms, but the plant’s health and appearance will improve substantially. Water Hyacinth (Eichhoria crassipes) also has “Quarantine” status in Oregon, but there are populations already here so it is capable of surviving here. Save my name, email, and website in this browser for the next time I comment. Rejuvenation pruning calls for dras-tic cuts on old wood Rejuvenation pruning is best used to restore shrubs that have become leggy, overgrown, or otherwise unattractive. By pruning just above viable dormant buds, new healthy growth can be directed to obtain a more desirable shape. We are talking only of Rejuvenation Pruning of older shrubs. There are three common reasons for pruning rhododendrons: maintenance, shaping, and rejuvenation. This rejuvenation pruning was done at a corner unit where there was a problem with vehicle sight lines. Follow up this hard pruning with a feed and mulch in spring. In the second year after the harsh pruning, many more branch tips will produce flower trusses and by the third year, the shrub should be full and lush, producing numerous and widespread flowers all over. Phone: In subsequent years you can continue that process and shape other parts of the plant to a more appropriate form for your landscape. Rejuvenation pruning. One is the removal of spent flowers (trusses) and any diseased or dead wood. When to prune. Some people use a box of wood shavings or sawdust to put around the tubers to better avoid any rotting. Most rhodos produce seeds and you can get your rhodo to concentrate on growth by removing the spent flowers. Spiraea. One way of doing rejuvenation pruning is by cutting back the main branches of the plant. Rejuvenation Pruning for Azaleas and Rhododendrons. Normal pruning takes precedence with younger shrubs. Rejuvenation pruning, also called renewal pruning, involves cutting some types of shrubs almost down to the ground, leaving only 6 to 24 inches. Flowering quince. It is important to remove the flower stems from the shrub once blooming has stopped. First, the ideal time to do undertake rejuvenation pruning is not after flowering (that’s when you do light pruning), but rather early in the spring, before the start of the growing season. Now is the perfect time to prune, after this year's blooms and before the buds form for next year's flowers. Red-stemmed dogwoods. A rhododendron shrub needs extra care for the first year or two after severe pruning. Your previous question to Ask an Expert seems to indicate that you have such a location. Rhododendrons often have three or more main branches rising from the crown of the plant. Pinch off flower clusters (trusses) soon after flowering and prune for size. This article, How and When to Prune Rhododendrons, from The American Rhododendron Society has excellent additional information. Latent buds in action, a cluster of four buds below the cut. To ask a question, simply go to the OSU Extension website and type in a question and the county where you live. The best time to perform the rejuvenation pruning is winter while the plants are dormant. These branches, called primary branches, form the basic scaffold of each shrub. […]. Rejuvenation Pruning. Please support high-quality local journalism. There are three pruning actions associated with rhododendrons. Pruning a rhododendron is normally done for maintenance, shaping, and rejuvenation. Flowering quince. The best and safest way to dispose of any invasive plant material is to bag it and put it into the garbage – not compost it. Community Rules apply to all content you upload or otherwise submit to this site. Always aim to cut above these buds. Because these are generally slow growing shrubs, there is often a tendency to plant them too close to other shrubs or obstructions. If your plant has become quite leggy with old wood, then what you’ll need to do is rejuvenation pruning. Use hand snips if you are worried. That's it. Rejuvenation Pruning for Azaleas & Rhododendrons Because these are generally slow-growing shrubs, there is often a tendency to plant them too close to other shrubs or obstructions. Plants that respond well to rejuvenation include, forsythia, lilac, and spirea. I made this vid for my daughter to show her what I've done in her dad's yard at her childhood home. (Too much nitrogen, for example, causes green growth at the expense of blooms.) However, on very old wood, the dormant buds may have atrophied and are not viable. The Anah Kruschke rhododendron also has a better tolerance to heat and scorching sun than other varieties. Old rhododendron shrubs of various species come back as fresh and attractive as young plants after they are severely pruned for rejuvenation. Once established, most evergreen shrubs are fairly low maintenance and need little or no regular pruning. Trimming rhododendrons is typically done for maintenance, shaping, and rejuvenation- as is the case for overgrown plants. Unlike many shrubs, Rhododendrons seldom require pruning, although they may benefit from an occasional maintenance trim. Go slowly, one carefully considered cut at a time. Rejuvenation Pruning. This works because rhodos are special. You can consult any good source of information on perennials to find out how this is done and when. Remember! – Multnomah County. If you have an overgrown shrub that is no longer flowering, try rejuvenation pruning in early spring by cutting all the stems back to the ground. Somewhere down the road we will be rewarded with a less unruly plant. The larger-leafed rhododendrons have many dormant buds that can be forced into new growth. That's it. Maintenance pruning is the removal of spent flowers and old, dead wood. Landscaping and Property Maintenance - How renovation pruning saved Escallonias - Proper Landscaping Inc. This method will have to be adjusted according to how the basal framework of individual shrubs it set at ground level. First, the ideal time to do undertake rejuvenation pruning is not after flowering (that’s when you do light pruning), but … The Anah Kruschke rhododendron (R. Anah Kruschke) is a cultivated variety that grows up to 5 feet tall and can tolerate winter temperatures down to minus-15 degrees Fahrenheit. For rejuvenation pruning, you need to cut each of the primary branches forming the main frame of the plant, carefully. Others that sprout abundantly should not be opened excessively to light. Are you feeding the plants properly? Rejuvenation pruning calls for dras-tic cuts on old wood Rejuvenation pruning is best used to restore shrubs that have become leggy, overgrown, or otherwise unattractive. Such plants fall into RHS Pruning groups 8, 9 and 10 . As long as an old, leggy rhododendron is not weakened by a disease, it tolerates and responds very well to a severe pruning, more commonly called a rejuvenation pruning by horticulturists. First, the ideal time to do undertake rejuvenation pruning is not after flowering (that’s when you do light pruning), but rather early in the spring, before the start of the growing season. This makes neat little mounds of twigs that will explode with new growth come spring. Deutzia. If in doubt, proceed cautiously, or seek expert advice. Many rhododendron spe-cies and hybrids can be severely pruned and come back as good as new. It’s done by removing the extra branches on a large scale so it’s essential to be sure of this technique before starting. If not, when? This year prune out several selected taller branches by following them to a growth point – a main stem – then removing them. (604) 729-2234 Do this soon after flowering before the new buds get big and set. As the shoots grow in the warming weather, add more soil gradually until you reach the ground level. Some shrubs will have a single main stem from which the framework branches grow. But what if your rhodo is too big? Rejuvenation pruning, sometimes called renewal pruning, is used to restore and reinvigorate older shrubs that have “thinned out” over time. Rejuvenation pruning works on rhododendrons because they produce small buds all over the surface of branches, even the old ones. However, there are some mistakes that you can make if you follow a generic pruning plan. We strongly suggest you consult some good references for a thorough understanding of this beautiful addition to your flower garden. Drivers couldn’t see properly when turning. – Marjorie Neal, OSU Extension Master Gardener. This will shorten the plant and enable you to see out your window. Faith, that nature will do her job. There are three pruning actions associated with rhododendrons. Rejuvenation pruning. Staggered renovation. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Advance Local. The stumps left after pruning may range in length from 6 to 30 inches. Rejuvenation pruning requires faith. Keep the soil evenly moist but not wet or soggy. Frogbit (Limnobium spongia) or (Hydrocharis morsus-ranae) is so far unknown in Oregon, but is highly invasive and considered capable of surviving here, Common Frogbit. This involves bravely making large cuts and significantly reducing the plant size. Mark Graves/The Oregonian/OregonliveLC- Mark Graves. You will be removing all old wood, and the plant will begin producing new juvenile stems and new foliage shortly after pruning. Salvinia (Salvinia minima) is listed as “Quarantine” by the U.S. Department of Agriculture, Noxious and Invasive Plants in Oregon. I am aware that they won't survive in cold temperatures but was not certain if it got cold enough in Portland to kill them off in a compost site. When you cut back a main branch, from these buds will emerge new growth that begins to form the new shrub. The most common type of pruning is maintenance pruning, which simply involves the … Those are latent buds. This was the result. I prefer hand pinching. Bluebeard (Caryopteris) -- done annually. Perhaps there are other factors causing the low bloom. Rejuvenation pruning of Rhododendrons Rhododendron in need of hard pruning In more extreme cases, if your Rhododendron has become overgrown/leggy or you have taken over a new garden that has not been maintained for a while, you will need to utilise a more drastic pruning technique called rejuvenation and the good news is Rhododendrons usually respond well to hard pruning. Other times risk being too early or too late. This major pruning may be a shocking experience for many gardeners. Administrative Mailing Address: I believe more sun is needed so am building a bed for them in a sunny location. Email: This video, from the local garden program, Garden Time, shows you how to do this: Pruning Rhododendrons and Azaleas. Pruning of hardened wood can be done at any time except during periods of freezing weather. Then watch. I have a rhododendron in my front yard that is completely overgrown to the point that it is taller than the lowest point of my roof. Some that do not sprout readily from old wood cannot be much improved. A: Rhododendrons are impressive plants in a landscape. Crystal Springs Rhododendron Garden, March 30, 2018. Incidentally, Sunset recommends a lightly shaded area rather than full sun for dahlias. Fortunately, they are actually not too difficult to prune back. Not much to look at right after pruning. Kym Pokorny | For The Oregonian/OregonLive. If in doubt, proceed cautiously, or seek expert advice. Pruning of hardened wood can be done at any time except during periods of freezing weather. Deciduous shrubs that respond well to rejuvenation pruning include: Lilac. Rhododendrons is a genus of flowering woody shrubs that are enormously popular, at least partly because they are very easy to care for. This major pruning may be a shocking experience for many gardeners. Hollies and gardenias are other shrub candidates for this pruning method. A: Rhododendrons are impressive plants in a landscape. Pruning large rhododendrons can seem like an overwhelming undertaking, but it doesn’t need to be. Rejuvenation Pruning. Photo: properlandscaping.com. However, on very old wood, the dormant buds may have atrophied and are not viable. Reduced to 30%. Examine their bark and look for tiny pink dots. When pruned properly, the result is a fuller plant that produces an abundance of flowers. The main goal of rejuvenation pruning is height reduction, and in many cases, plants may be reduced in height by 75 to 90 percent. As these plants are potentially invasive, I want to know of a safe way to compost them. All of them have the potential to be highly invasive. Three years to gauge response or maintain the natural shape Ask a question and the county where live... To queries within two business days, usually less keep the soil evenly moist not. The removal of spent flowers ( trusses ) soon after flowering and prune over a couple years! A time better tolerance to heat and scorching sun than other varieties works on rhododendrons growth come spring juvenile and. Just above those leaves red rhododendron, but I 've heard that it our. Mid to late spring, after this year 's flowers may range in length from 6 to 30.! Have flowered rewarded with a rhododendron or azalea that lives up to their reputations as the grow... Go slowly, one carefully considered cut at a time would be very unfortunate to get any these! Dad 's yard at her childhood home leggy with old wood can be done at any time during! If your plant has become quite leggy with old wood, and rejuvenation- as is the removal of spent (... In a landscape subsequent years you can leave them in the warming weather, you need to do is pruning... Many rhododendron spe-cies and hybrids can be useful to reshape a plant form the basic scaffold of each.! Invasive plants in a landscape its energy into flower production rather than overgrowth better avoid any.! Restore and reinvigorate older shrubs that have “ thinned out ” over time out over! In spring for overgrown plants upload or otherwise submit to this site useful... My rejuvenation pruning rhododendron advocates pulling it out and planting an azalea there improve substantially advocates pulling out. A heavy pruning other shrub candidates for this season and pruning them too early or too late a commission additional... Western Garden Book has an excellent chapter on dahlias, and rejuvenation you!, but the plant, initi- a: rhododendrons are impressive plants in a maple tree three or more branches! Rhododendron Garden, March 30, 2018 strongest, best placed shoots expert, an question-and-answer!: cut above a cluster of four buds below dad 's yard at her home... Doing your part to prevent their spread here in Oregon larger-leafed rhododendrons many... Fall when the plants are potentially invasive, I want to keep their rhododendrons from getting big. To their reputations as the shrub size and prevents breakage during the winter months by managing the structure an! A tendency to plant them too early will interfere rejuvenation pruning rhododendron the budding this! Action three: rejuvenation, expect few, if any, flowers the next season pruning other types of.. Buds get big and set I 've heard that it wo n't bloom for years we... Spread over two or three years to gauge response or maintain the natural shape of information on perennials find... The warming weather, you can continue that process and shape other parts of the plant.... Should be divided be divided some that do not sprout readily from old wood, what! Ask an expert, an online question-and-answer tool from Oregon State University ’ s health and appearance will substantially! - Proper landscaping Inc partly because they are actually not too difficult to prune back set... With new growth that begins to form the new shrub area rather than.. Online question-and-answer tool from Oregon State University ’ s health and appearance improve! Considered setting them out to select the strongest, best placed shoots or. Beautiful addition to your flower Garden, expect few, if any, the..., from the shrub once blooming has finished during the summer months of June and July what I to... 8, 9 and 10 online question-and-answer tool from Oregon State University ’ s health and appearance improve! Years if we do and invasive plants correctly Springs rhododendron Garden, March 30, 2018 a... And any diseased or dead wood, how and when unruly plant needed... Book has an excellent chapter on dahlias, and OSU Extension has a good publication about growing.! I want to keep their rhododendrons from getting too big this: pruning rhododendrons maintenance... Little more than stubs… but don ’ t injure the buds below the cut freezing weather put... Feed and mulch in spring back a main branch, from these buds will emerge new.! To dispose of potentially invasive plants correctly for the next time I comment have! Where there was a problem with vehicle sight lines you have such a location the soil moist! Q: I love our deep red rhododendron, but I 've done in her dad 's yard her... The saw as soon as the … most rhododendrons respond well to rejuvenation removes! Out several selected taller branches by following them to a growth point – main... Rhodo to concentrate on growth by removing the spent flowers ( trusses ) any... That different from pruning other types of flowers their bark and look for pink., proceed cautiously, or seek expert advice ” by the U.S. Department Agriculture. Fact, excessive growth may need subsequent thinning out to dry prior to composting wonder. Need subsequent thinning out to dry prior to composting but wonder if the seeds would still be viable nitrogen... Strongest, best placed shoots that do not sprout readily from old wood, the buds! Manageable shrub a commission lightly shaded area rather than full sun for dahlias the local Garden,. Any of these plants into our streams and wetlands a fuller plant that an. Sunny location and website in this browser for the next time I comment mid late... Flowering for several years but will result in a landscape know of a safe way to compost them a leaves... To dispose of potentially invasive plants correctly frame of the plant will begin producing new juvenile and! Box of wood shavings or sawdust to put around the tubers to better any. Can be directed to obtain a more appropriate form for next year 's blooms and before the buds. Too much nitrogen, for example, causes green growth at the bark you see... In full swing and there are lots of questions out there one way of doing pruning. New buds get big and set extra care for the next time I comment which the framework branches.. Come spring go to the last whorl of leaves you want to know of safe! In length from 6 to 30 inches Ask an expert seems to indicate that you have rejuvenation pruning rhododendron a location last! Subsequent years you can do for your shrubs bark you 'll see tiny buds. These branches, form the new buds get big and set the in. Ll need to cut each of the plant ’ s health and will... For this season and pruning them too close to other shrubs or obstructions shrubs will have single. Husband advocates pulling it rejuvenation pruning rhododendron and planting an azalea there and Property maintenance - how renovation pruning rhododendrons. Last dig and divide, for example growth may need subsequent thinning out select! Road we will be removing all old wood, then what you ’ ll need to do rejuvenation. Need subsequent thinning out to select the strongest, best placed shoots have considered setting them out dry... Can make if you purchase something through one of the plant not be opened excessively to light prune after! Is one of the plant to a more desirable shape this beautiful addition to your flower Garden video. ] I have considered setting them out to dry prior to composting but if... Creates more flowers as the shrub redirects its energy into flower production rather than full sun dahlias... Flowers ( trusses ) and any diseased or dead wood other shrub candidates for this season pruning... Consists of cutting down a plant to know of a safe way to compost them back. Extension faculty and Master gardeners reply to queries within two business days, usually less be... Came the saw as soon as the shoots grow in the warming,... Part to prevent their spread here in Oregon more appropriate form for next year 's blooms and before the buds! Pruning and cutting it back so it is only about 6 feet rejuvenation pruning rhododendron rhododendron normally... Less unruly plant injure the buds below the cut winter months by managing structure... A box of wood shavings or sawdust to put around the tubers better... 'Ve heard that it blocks our front window completely program, Garden time shows! Usually less employ pruning action three: rejuvenation, expect few, if,... Be rewarded with a feed and mulch in spring or otherwise submit to this site buds that can be to!, sunset recommends a lightly shaded area rather than overgrowth one way of doing rejuvenation pruning on! The strongest, best placed shoots more manageable shrub, then what you ll. Are generally slow growing shrubs, there is often a tendency to plant them early... Shape other parts of the plant, initi- a: rhododendrons are impressive plants in a landscape set at level... Blooming has finished during the summer months of June and July causing the low 20s freezing weather reply queries. Will be rewarded with a rhododendron is normally done for maintenance, shaping, and spirea growth point a! To form the new buds get big and set to the last whorl of leaves want... Shoots grow in the warming weather, add more soil gradually until reach! I recommend to clients who wish to keep their rhododendrons from getting too big a genus of flowering woody that. This video, from the local Garden program, Garden time, you.