They will open up and come back to life once it warms up. Has the drainage changed so it’s getting too much water? Since you’ve had a wetter spring than usual, they will likely recover when the soil dries out. I will check on these things. As a last-chance effort, you can try cutting the stems down to a few inches above the ground and see if it starts growing again. Has done well in past. There are a few reasons that hydrangea leaves can curl like this - you can think about which one is more likely for your plant, but fungus isn't one of them so you can stop using any fungicide. Le rhododendron ne nécessite pas de taille. (Since you had another one die recently in the same area, it could also be some kind disease, in which case, there’s probably not much you can do). Pick a leaf from a rhododendron and examine it. Learn to Love Gardening Anyway, Get a Tropical Splash With a Bird's Nest Fern, Smell This Shocking Flower at Your Own Risk, Great Garden Combo: Silver Sparkles Amid Purple and Blue Foliage. Rhododendron specific fertiliser in late spring after flower finishes and just before new growth starts. First, take a look at how well your soil drains. Some immature ladybird beetles may resemble the mealybugs, but move faster. In another year you shouldn't even notice it whether you prune or not unless it does it again. Are there other plants that have gotten bigger and may be interfering with the Rhododendron’s roots or causing it to get too much shade? Sprinkle some Epsom Salts* around the plant to correct the issue. If the branches are shriveled and brittle, it may not come back. Since you are still getting blooms, it sounds like that isn’t too much of an issue. These nocturnal feeders leave behind evidence which looks like someone has run amok with a paper punch. Pour cela, coupez-les en fin d'été, et au-dessus d'un œil (bourgeon dormant) pour favoriser la ramification. They are in a row in front of my home. There are no effective specific biological controls and thus control can be difficult to achieve. Another is Long-tailed Mealybug, Pseudococcus longispinus which creates small cottony masses with long, waxy filaments extending from one end is a symptom of the long-tailed mealybug, Pseudococcus longispinus, which is a sucking insect that colonizes on the least accessible parts of plants. Some also have young leaves and stems covered in a striking woolly coating (indumentum) and some - the deciduous rhododendrons or azaleas - have good autumn colour. A third possibility is Thrips, Thrips imaginis. Rhododendron Problems: What’s Wrong With My Rhododendron? Is there any evidence of insects or disease? Epsom Salts* According to the American Rhododendron Society, if the plant has older leaves that have turned yellow between green veins, you likely have a Magnesium deficiency.Sprinkle some Epsom Salts* around the plant to correct the issue.. Iron Sulfate*. Fertilizer probably isn’t a good idea. Bear in mind that for 11 months of the year you have only the leaves to enjoy. So you may want to take a look at rejuvenating the plant, by pruning it or improving the area around it to make the plant happier. However, occasionally you may run into an issue where your plants are just not looking up to par. You can download it for free, or buy a printed copy. In the autumn the leaves started to get brown, drying, but not on the hole branch. Sometimes you notice a few dead branches, yellow or dried out leaves and wonder if the rhododendron … Symptoms: Decline in vigour and leaves … Required fields are marked *. Water immediately! Rhododendron is a genus of shrubs and small to (rarely) large trees, the smallest species growing to 10–100 cm (4–40 in) tall, and the largest, R. protistum var. I had one plant last year that all of the stems eventually died back, and I thought it was dead. I have many plants that have shown this type of new growth. On one side of the plant it had a branch with smaller, deformed, curled leaves.