Look at the base of the trunk/stem to see if the bark has been chewed or stripped from around the plant. Stress burn or scorch is a phenomenon that is not uncommon in broadleaf evergreens like rhododendron. During long periods of dry weather, windy conditions, or bright sunshine leaves may take on a dry, crispy appearance around the edges. 4. Many diseases and other problems can be prevented by following the recommended cultural practices for proper planting and care. It’s in the spring, when many plants are breaking dormancy and putting on new growth more rapidly than we can imagine possible, that we finally see the damage that winter has done to our Rhododendron shrubs. You should know that this is a serious problem because your entire plant might eventually die. What can be happening to it all of a sudden? Plantrama The remainder of the plant will appear healthy. Rhododendron leaves will curl inward and droop. This spring’s bloom was the best in a long time. The two primary reasons that rhododendron leaves turn brown are cold weather and rhododendron wilt. I can’t see a girdled or damaged stem. We have what was a beautifully thriving rhododendron{PJM} that suddenly looks as if it is dying. If you feel the need to fertilize, do so sparingly and with something organic instead of the blue colored liquid soluble fertilizers. A second type of Rhododendron issue is brown spots on the leaves. Leaves are the best indicators of plant problems. These shrubs take … Curling Leaves On Pjm Rhodedendron - Knowledgebase Question. Prolonged saturation leads to diseases that kill an entire plant, not just its leaves. When the side margins of the leaves are burnt brown, and perhaps curling under, then this is often a symptom of too high a pH (too limey soil). Brown leaf edges or entire leaves that have turned crispy are winter damage, usually from a combination of the ground being frozen (the plant can’t absorb water that is being lost through the leaves), sunburn from direct sun or sunlight being reflected off snow, or wind burn. All Rights Reserved Over a thousand species are contained within the Rhododendron genus, but most have enough points in common that the same general care can be used for all species. The GardenLady Brown edges, spots on the leaves, toasted stems, curled foliage and wholesale die-back…all of this can be seen in areas that had a cold winter. This is called leaf scorch, and depending on the severity, the leaves may drop prematurely. Dead leaves will look yellow or brown, and dead branches will be crispy and snap easily. ... a dark brown zone down the center of the leaves results. Levittown, NY. Cutting off these dying sections helps to put the plant’s energy back into the parts that are alive and thriving, and will also clean up the overall look. CAUSE: Phosphorus deficiency usually shows up first at the bottom of the plant (on the oldest leaves) and progressively climbs up the plant if untreated. The leaves are curling lengthwise and it has been an exceedingly dry and hot summer. Many wonder if their weekend project has to be the removal of these brown leaves or crispy stems, while others wonder if there is a disease or insect at work on their plants. 3. Whole Life Gardening, All Photographs by C.L. Here’s the scoop on winter damaged Rhododendrons: 1. Your rhododendron leaves are turning brown because they may be suffering from scorched leaves. North Bennington, VT. Site by Terry Gavin. The latter is … Best offers for your Garden - https://amzn.to/2InnD0w---------------Why Are My Rhododendron Leaves Turning Brown?. Random leaves that look burned are common after a cold winter. As the leaves droop and curl, they are hypothetically increasing the humidity around their leaves and thus reducing their chances of desiccation. Q. First, take a look at how well your soil drains. Rhododendrons should be watered regularly and thoroughly so that each plant's entire root zone is mois… Mealybugs also cause yellow or white spots on the foliage and a sticky substance on the plant or nearby furniture. Gardeners claim they can tell the temperature by how their Rhododendron leaves appear; the more they roll and droop, the colder it is, until around zero they start to look like green beans hanging from the branches. Was it something that killed it at root level? 2. Waterlogged roots suffocate and shut down, leaving no avenue to replace water lost to drying winds and sunlight. “There’s a big difference between mostly dead and all dead. Rhododendrons and azaleas are some of the most popular spring-flowering shrubs in the landscape, and healthy plants can give years of pleasure. Soon the new foliage will grow and you won’t notice this leaf spot as much. For starters, Rhododendron simply do not open their stomata during the colder months. Rhododendron Leaves Curling and Turning Yellow and Orange - Knowledgebase Question. The evergreens curl their leaves snugly or relax them according to the intensity of the cold. Sucking insects, such as aphids, can distort leaves and cause leaf curling. The site gets sun from about 2pm onwards in high summer, otherwise is shaded. Any idea what causes this? I planted two rhododendrons in May in a raised bed, next to each other. 8). By Manwithspear. Why are my rhododendron leaves turning brown? Likewise, why are the leaves on my rhododendron turning yellow? This plant is probably all dead. Rhodies are picky about the soil you plant them in and about how much water they like. Question by Mufasa345919 August 19, 2002. I have no idea, but it’s not getting any better as spring goes on. It isn’t any drier than the other Rhododendrons in the area and they aren’t curled. Another disease that could cause discoloration such as brown or yellow on the leaves of the rhododendron is phytophthora. But they can addle the gardener's mind with several types of leaf diseases. rhododendron with a more desirable variety. Brown edges, spots on the leaves, toasted stems, curled foliage and wholesale die-back…all of this can be seen in areas that had a cold winter. Some have red-brown borders with silvery gray centers. Heat or cold stress causes damage to rhododendron leaves. Poor drainage and overwatering are common causes of browning leaves and stems. It seems to be happening in sections of the plant. It just shows up more after those spotted areas died out more throughly over the winter and because some Rhododendron leaves are still yellowish from the winter. 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