Magnolia x 'Jane' #deciduousmagnolias #magnolias #, iris ensata 'Variegata' - #irises #gardenphotograp, Cornus elliptica - evergreen dogwood #dogwood #gar, geoffrey chadbund hydrangea #hydrangea #hydrangeas, Clematis 'Jackmanii' - first modern large-flowered, Wheel bug nymph on Verbena bonariensis - Assassin, He ducked back into the Virginia creeper shortly t, This error message is only visible to WordPress admins, care and planting of pot-bound rhododendrons, Iris cristata – Gentle and Powerful – Hello Old Friend, Magnolia grandiflora – Musings on the Southern Magnolia, Yellow Flag Iris & What We (Don’t) Know About Climate Change, Calycanthus floridus ‘Athens’ – Sweetshrub, Papavar somniferum – Common Garden Poppy – Southern Gothic, Acer rubrum – Red Maple. Her bush does have some new leaves coming out on the dead branches about a foot from the ground. Before attempting to plant, test your soil’s pH. Our part in why rhododendrons fail: We plant them too deeply (and they are often pot-bound as well). Set the rhododendron in the planting hole and then fill with a mix specific to rhododendrons and azaleas (acidic and loose). My daughter has a bush where the entire back of the bush is dead. Best offers for your Garden - https://amzn.to/2InnD0w ----- My Rhododendron Has Dead & Yellow Leaves. How to Plant A Rhododendron Properly I’m gonna keep this short and simple: When planting a rhododendron, ignore almost everything you’ve learned when it comes to planting in the garden (big deep hole). These diseases need three things to thrive: moisture, warmth, and something else that escapes me for now. Clemson University has a good write-up on the primary dangers to rhododendrons. hereistom/CC-BY-2.0 The two primary reasons that rhododendron leaves turn brown are cold weather and rhododendron wilt. Move your rhododendron if you think it may be getting direct afternoon sunlight. These diseases need three things to thrive: moisture, warmth, and something else that escapes me for now. There are two primary disease threats to rhododendrons (and these threats strike fast and hard like assassins in the night): Phytophthora and Botryosphaeria dothidea. If it looks green or bright underneath, it’s healthy; if it looks brown, the branch is probably dead. Non-chemical control. Changing the soil creates a lot of stress on the plant, so do not take this step unless you believe it is the only chance of saving the rhododendron. Rare in my garden are annuals, their uniform sameness unrelenting through summer. In areas where night-time summer temperatures fall below 50 degrees F. or so, the fungus’ life cycle is interrupted. Ask Barrie Find your winter hardiness zone Easy to grow vs. hard to grow plants, Looking like a character straight from the pages of Midnight in the Garden of Good and Evil, the man …, Magnolia grandiflora is a big tree and somewhat out of fashion these days. I have had it for about 7 years in a pot on my patio. There is no curative spray. Make sure the drainage pan is not retaining water that may be harming the roots of the rhododendron. Curious to see if the shrub would recover on its own, I trimmed it back a bit, cut back the scaffold of branches to as pleasing a shape as possible, and waited to see what would happen. For all of you who have admired rhododendrons in the garden centers every spring and succumbed to a purchase, I am here to tell you: It is (mostly) not your fault. The adult borer is a moth, which lays eggs typically at the base of … Last year it had a lot of cabbage catepillars on it. If the shrub has been growing healthy and all of a sudden has dead branches, the shrub likely is suffering from fungus disease. PH test kits are simple to use and available to purchase at garden centers. Rhododendrons are lovely plants with enchanting blooms that range from dark red to lavender. Some varieties will do much better than others when drastically cut back. You will need to grade the inevitable mound gently away to avoid erosion problems. Dark brown dead roots= Phytophthora caused by poor drainage. If you believe that your rhododendrons suffered from winter injury, the best thing you can do now is wait to see if any of the damaged branches survived. Unfortunately, the lovely plant is prone to disease and pests. Rhododendrons prefer acidic soil with a pH of about 5.5. The easiest style of pruning is trimming off any dead or dying parts of your rhododendron with pruning shears. The most common rhododendron disease is stem dieback, which is characterized by death of the branches, in an otherwise healthy plant. The great mystery for many gardeners who lose rhododendrons is that they can’t figure out whether the problem was too much water or too little. Why Rhododendrons Die For those of us who visit areas with cool summer nights (think Appalachian mountains), it can be disheartening to see rhododendrons majestically covering the landscape of seemingly every home one passes, the memory fresh of our own pitiful plants withering away down on the Piedmont (or Coastal Plain). If the soil crumples and returns to a loose state after you pinch it, it is fine. you must plant correctly. Who was Frank Brownlee and why is a camellia named after him? i.e. Barrie Collins, BLA/MLA Landscape Architecture, University of Georgia 297 Lyndon Ave. Athens, Ga. | 706.286.5720 | Email Barrie, Boulevard Woods – Phase 3, Arboretum Master Plan, Native Plants Have a gardening question? 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