Make sure that the rhododendron is in the right location. Reviewin… 9 year old PJM Northern Lights rhododendron that appears to be close to the end. Keep an eye on the temperature, and if it seems like your plant is getting dried out, consider misting it to boost the humidity. This condition is caused by a fungus called Botryosphaeria dothidea. This disease can be controlled by collecting and burning the affected leaves, and spraying the plant with a fungicide. The shrub prefers the afternoon shade. If your azalea won’t grow leaves, you should also consider the possibility of diseases. Sometimes one or more of these are contributing factors because if the rhodys went into the winter season dry from summer drought they are then more likely to be further stressed by cold winters. Rhododendron are evergreen, flowering from late autumn to early summer. The ideal location would be south, southwest or west direction. Even pests like aphids, bark beetles, spider mites, scales, weevils, and caterpillars can attack this plant. Give them plenty of water during periods of drought. The shrub's colorful blossoms are meant to be viewed against a lustrous backdrop of green. The larger-leaved elepidote rhododendrons keep their leaves for 3 or 4 seasons. You also have the option to opt-out of these cookies. Rhododendron lace bug is closely related to the better known Pieris lace bug. If your plant is already ill, the added stress of an infestation may kill it. Sometimes you notice a few dead branches, yellow or dried out leaves and wonder if the rhododendron … Rhododendron are often planted in afternoon shade so hot summer sun won’t burn the leaves. Then, as small black, clear-winged moths, they lay eggs on rhododendron leaves, twigs or the rough bark of the main stems. 6789 Quail Hill Pkwy, Suite 211 Irvine CA 92603. Keep an eye on the temperature, and if it seems like your plant is getting … Barberries (Berberis spp.) Leaves that curled up over the winter are protecting themselves and will likely open up again in the spring. I have a rhododendron. Necessary cookies are absolutely essential for the website to function properly. However, in some cases, many leaves are turning yellow. Cut out any infested twigs and branches below the borer holes and discard them in the trash. Jun 10, 2003 Canoneer . As the leaves droop and curl, they are hypothetically increasing the humidity around their leaves and thus reducing their chances of desiccation. When brown leaves show up in a rhododendron, it's usually at winter's end -- right before flowering time. 1. Check the soil for moisture. It just shows up more after those spotted areas died out more throughly over the winter and because some Rhododendron leaves are still This condition indicates lack of iron. Removing the dead branch improves the look of the shrub tremendously. Leaves with excessive browning from winter or summer … Our site includes quite a bit of content, so if you're having an issue finding what you're looking for, go on ahead and use that search feature there! Azaleas need well draining soil to avoid root rot. Winter damage that makes foliage brown can have several causes, but all relate to excessive drying of rhododendron leaves. Photo: These micronutrients include iron, manganese, and zinc. giganteum, reported to 30 m (100 ft) tall. This condition is characterized by the presence of water blisters on the leaves and other parts. Although leaves may drop, powdery mildew is rarely fatal. Fungicide application in late spring and summer help the shrub to recover. 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 … Remove each faded rhododendron blossom from the shrub promptly upon wilting. Rolled Up Leaves in Summer Could Be a Sign of Dry Soil Much like any other plant, if a rhododendron doesn't get enough water, it will wilt. Use fungicides and follow the directions in the bottle. Drought can … Learn why these reblooming azaleas offer more of what you love in the landscape. Inclusion of a product does not indicate a recommendation or endorsement by the RHS. 1024) { These include late freezes, drought, virus and disease, mites and insects. This condition may eventually affect the growth of the plants. I have some 2-year-old rhododendrons planted in three different locations.