After the plant is 10 years old, we would not recommend this type of pruning any more.. – Clatsop County, A: It definitely can be difficult to make a decision about what materials to use to frame a raised bed. You should do this if … RHODODENDRONS IN THE PACIFIC NORTHWEST BY HERBERT IHRIG Ghairman, Rhododendron Committee Arboretum Foundation Seattle, Washington THE greatest area in America for growing rhododendrons is the Pacific Northwest. — M.S., Mahopac, NY. My neighbor would like to replace with a panel fence that I’m worried will harm the trees since sunlight won’t be able to pass through. Ornamental grasses are popular in our Northwest gardens, too. Pop the stems and any remaining flowers in a vase in the house for a burst of fragrant scent. Need help with larger projects, like pruning trees and shrubs? Before attempting to plant, test your soil’s pH. The Royal Horticultural Society is the UK’s leading gardening charity. Learn how your comment data is processed. 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). Go even heavier on older plants, but don’t go into leafless wood. At this … There is minimal research data available on exactly which materials are considered safe but some materials that have been discovered to be more risky choices. Although they are easy maintenance plants, they still require cutting back in the fall. Shape your lavender into “ice cream cones”. The popular bushes can be long-lived and healthy if given proper care. Or, use longer bladed hedging shears to make short work of your task. They add color to our yards and gardens and are generally easy to care for. preferable to southern exposures. Best and Worst Time to Prune Rhododendrons. A: You can prune your rhododendrons anytime. Or, maybe you’re the one doing the pruning, trimming back plants that have finished their blooming cycle or have already started to go into dormancy. Overall, the best time to prune your trees is when they’re dormant, so late winter to early spring is ideal. From your description it sounds like you are growing edible crops (veggies) and are not interested in an unframed/mound type raised bed. Here in the Northwest, there are a variety of plants we call favorites. plant's root system to get well established during the colder fall and winter months. If you look at arborvitae hedges as you drive around town, you will often see them next to a fence, and doing their best to come on through. While Rhododendrons will tolerate shade as well as the Pacific Northwest sun, they thrive in areas that receive partial or filtered light. Not cedar. For shade trees like ash and oak, winter is the perfect time. Rhododendrons and azaleas do well with direct light for at least part of the day. Everyone has a list of “not to use”. They can be cut to the ground, if desired. However, any time between the first frost in fall and the last frost in spring (while the sap is low) will work. The following is a list of Azaleas and Rhododendrons recognized as proven performers in the Pacific Northwest region. You should prune the rhododendron before the buds form so you don’t lop off the following year’s flowers. Rhododendrons, many species of which offer showy displays of large blossoms, are the state flowers of West Virginia and Washington state. Rhododendron-Ramorum Leaf Blight and Shoot Dieback. P. plurivora is common during warmer months and is most … A: Rhododendrons are usually pruned in the spring, right after blooming. Then, use your pruning shears to trim the stems down to about 3” from the ground. There are both evergreen and deciduous species of rhododendrons; they grow as shrubs and sometimes as small trees. If you do see new growth, however, make sure to trim carefully, leaving the tender green shoots in place. With your pruning shear, carefully prune right below the blossoms where there’s still green. Get involved. Rhododendrons typically do well in … It might seem like a drastic trim, but these hardy plants will grow back in no time. Established plants can be pruned heavily, to at least 1/3 of the growth. T o develop a good structure on young rhododendrons, we tip prune them for their first 5 years. However, the best time to prune rhododendrons is right after the plant stops blooming. When is the best time to prune flowering shrubs and hedges, such as dwarf cork bushes, azaleas, rhododendrons, and lilacs? If you wish to prune repeat-flowering roses – inclusive of hybrid teas and floribunda roses – in the Pacific Northwest it’s best to do so towards the end of February. Locations near high branched trees at the edge of a woodland, or an area that receives morning sun and afternoon shade are ideal. This will be a yearly task and since they bloom on new wood, this shouldn’t interfere with their flower production. Rhododendrons appreciate filtered shade, but will not set bloom properly in dark shade. Rhododendrons range in size from tiny shrubs such as Rhododendron ‘Cilpinense’, R. lutescens and R. spinuliferum, with its red firecracker-like flowers, up to the impressive tree rhododendrons from the rainforests of the Himalayas in western China which reach 20-30m (up to 100′) tall. Cut them back so about a third of last year’s growth remains. Plants in warm, relatively frost-free southern climates can be pruned in late winter, while plants in colder northern climates may stay dormant longer. This can be frustrating when you want a clear answer. Japanese blood grass, maiden grass (Miscanthus), fountain grass (Pennisetum) and hardy pampas grass (Saccharum) are all warm season grasses.Cool season grasses start producing new growth early in the spring, after temperatures begin to stay above freezing. Rhododendrons that have outgrown their site or have become tall, ungainly, and sparse of bloom can be rejuvenated by judicious pruning, preferably in early spring. You can continue this practice and will be rewarded with plants that have increased branching, and thus more flowers. In the Landscape: Rhododendrons have long been a favorite of landscapers in the Pacific Northwest. This territory extends along the coastal region from British Columbia through Washington, Oregon and northern California. Remove all the spent blossoms. The common name of Rhododendron macrophyllum is the Pacific, Western, or Coast Rhododendron. – Benton County, A: I think your hedge will be fine. As you have found from your own research, there is data available that has deemed certain materials riskier. Follow this simple rule: remove any canes that gave you fruit. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place. – Brooke Edmunds, OSU Extension horticulturist. (In fact, that’s the only time to prune birch trees and American elms.) Not treated lumber. As the bloom season winds down in early June, it signals a perfect time to groom and prune your rhododendrons to keep them from outgrowing their space. AURORA - Rhododendrons and azaleas herald spring in Oregon. The best time to prune rhododendrons is right after the flowers fade. These fast growing, hardy plants can loom 6’ or more in your yard. They begin flowering later in the summer and into the fall.Once you’ve determined the type of grass you’re dealing with, then you can plan your pruning. What’s yours? Give us a call at (360) 265-5231. Q: Can I prune rhododendrons now, in the fall? You can prune out dead or diseased branches at any time, however. Prune back to a whorl of leaves or to an obvious growth point where new green growth is emerging. Kym Pokorny | For The Oregonian/OregonLive, Subscribe to newsletters from The Oregonian/OregonLive. Basically, proving something “safe” is considerably more difficult than proving that something is a potential risk. Not redwood. What most people seem to do is to fertilize twice a year, the first time in February/March before the plants really start growing and the second time in June, right at the end of flowering season. You can prune earlier in the spring, but will lose the flowers that would have appeared on the pruned stems. So, these materials are no longer recommended for use in edible gardens. © 2020 Levy's Lawns and Landscaping | 916 Division St, Port Orchard, WA 98366 | (360) 876-6567 | todd@levyslawnsandlandscaping.com, Levy’s Lawns and Landscaping in the Pacific Northwest – (360) 876-6567, Levy’s Lawns and Landscaping, Bainbridge Island, WA, Levy’s Lawns and Landscaping, Belfair, Allyn, WA, Levy’s Lawns and Landscaping, Bremerton, WA, Levy’s Lawns & Landscaping Gig Harbor, WA, Levy’s Lawns & Landscaping, Port Orchard, WA, Levy’s Lawns and Landscaping, Poulsbo, WA, Levy’s Lawns and Landscaping, Silverdale, WA, Fall Pruning Basics for Your Favorite Pacific Northwest Plants, 5 Easy Tips for Winterizing your Lawn in the Pacific Northwest. There are literally 100s of choices. Cool season ornamental grasses include fescue, ribbon grass (Phalaris), feather grass (Stipa), northern sea oats and tufted hair grass. that also offers cost effective and flexible building plans. Do you have a suggestion for a safe material? Subscribe to OregonLive. Join now. The best time to prune your rhododendron is within a couple of weeks after flowering is finished. Wait a couple months to prune the completely dormant plants to ensure a great yield next season. Pruning is essential to remove dead, dying, and diseased material. Here is a nice article describing some common arborvitae issues that you may find helpful. As fall quickly approaches, if you’re like most Pacific Northwest gardeners, you’ve got Levy’s Lawns and Landscape or other landscape company out in the yard, pruning, lopping and cutting back the abundant remains of your garden. To prevent too much flower loss, look for … The lack of sunlight to the lower branches will not harm the trees. Prune rhododendrons soon after the blooms fade. If the plant isn’t taking over the yard or blocking your view, the ideal time to take pruning shears to a healthy rhododendron is in late winter. The plant will fill in rapidly if properly pruned. Exposure to constant wind is not desirable, especially the salty Rhododendrons prefer acidic soil with a pH of about 5.5. If you can, wait until January, when the birds have eaten their fill of the sedum seeds which have fallen to the ground. Join the RHS today and get 12 months for the price of 9. If your large rhododendron is growing out of control and starting to look like a mess, you’ve got some pruning to do. Pruning encourages new growth, so pruning in spring gives the new growth time to mature so it can survive winter’s harsh weather. You can prune in early spring or late winter to discourage your plant from producing as many flowers, and encourage it to put its energy into growing new branches and leaves. The stems that yielded fruit will still be clinging to the canes, making it easy to tell which ones to cut back. The Pacific Northwest has one of the finest rhododendron growing climates in the country. Attractive landscape plants in cool and moist climates, many varieties have been struggling in the U.S. Pacific Northwest region as a result of sea coast winds and other tough conditions. Snip the flower heads off the stems of your hydrangeas, just above the swollen buds at the base of the flowers. Following are tips and essential information where to plant how to grow, care, deadhead and prune rhododendrons … – Ann Kinkley, OSU Extension Master Gardener, A post shared by Bozeman (@b0zeman) on Jun 3, 2019 at 6:56pm PDT, Q: I read that there are many bad choices for vegetable garden bed framing materials due to the leaching of chemicals into the soil. Prune them in February to between three and twelve inches high. Wobbly, lanky branches may indicate that the area has become too shady. Subscribe to newsletters from The Oregonian/OregonLive, including Homes & Gardens emailed to you every Friday. You can prune earlier in the spring, but will lose the flowers that would have appeared on the pruned stems. Remove the oldest, woodiest branches—they’re the ones least likely to flower next year. And spring is a good time to give these beautiful shrubs the care they deserve. Unfortunately, there just haven’t been studies done on long-term raised bed framing materials utilized under all the different growing conditions, soil, fertilizer regimes, and edible plant combinations. But, before you start whacking away at your grasses, first you need to determine whether it’s a cool season or a warm season grass. Please support high-quality local journalism. Then, the new growth that occurs after pruning will have time to set flower buds that will bloom the following spring. Not creosote. “Autumn Joy” Sedum is a popular plant in Pacific Northwest gardens. Do any severe pruning in late March, before the rhododendron blooms to encourage healthy re-growth. Is the light they’ll receive above the fence line going to be sufficient or should I insist on another “good neighbor” fence? This includes older treated lumber and railroad ties, for example, which have been found to leach small amounts of the wood preservative into the surrounding soil. © 2020 Advance Local Media LLC. They also start flowering by early summer, making them good additions in the short growing season of a northern garden.Warm season grasses start their growth much later in the spring. Prune before the blooming season to reduce the number of flowers. Not a mound. Hopefully, you’ve eaten your fill of the tasty gems, and frozen some for the winter months. This region is usually defined as the province of British Columbia in Canada and the states of Washington and Oregon in the United States. This article has additional information, Pruning Rhododendrons. They look very healthy now and are tall enough so that the lower branches between the hedge and the fence will thin out over time, but the side facing you should be just fine. Don't attempt to do it all at once. We’re still getting plenty of questions to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Advance Local. If planned well, a garden can dazzle with rhododendron and azalea blossoms all season long by planting plants that bloom from late winter to late spring. My easternmost hedge I planted within a couple of feet from a “good neighbor” fence that allows sunlight to pass through. What should I use? Note to readers: if you purchase something through one of our affiliate links we may earn a commission. PH test kits are simple to use and available to purchase at garden centers. They stand at about 8 to 9 feet at present. Aug 10, 2019 - Explore Alex Watkins's board "Pruning rhododendrons" on Pinterest. Here are some questions asked by other gardeners. Using untreated wood as a framing material is likely the least risky choice available (compared to treated wood, plastics, etc.) Not concrete. See more ideas about Pruning rhododendrons, Rhododendron, Propagation. Phytophthora syringae, is common during the cool winter months. “Autumn Joy” Sedum is a popular plant in Pacific Northwest gardens. Growing edible crops ( veggies ) and are generally easy to grow provided you plant them in February between! Pruning shears to trim when to prune rhododendrons in pacific northwest, leaving the tender green shoots in place ’ or more in yard! Acidic enough, it can when to prune rhododendrons in pacific northwest long-lived and healthy if given proper.. Tolerate shade as well as the Pacific Northwest region of North America stems down about... 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