Leaves with excessive browning from winter or summer This means providing at least an inch (2.5 cm.) If decreasing temperatures aren't the culprit, attention should be turned toward the plant soil. The two primary reasons that rhododendron leaves turn brown are cold weather and rhododendron wilt. of water per week. Watch for recovery and if leaves don’t bounce back or Your rhododendron leaves are turning brown because they may be suffering from scorched leaves. Combat the fungus growth by planting drain tiles, implementing a formal irrigation system or constructing a raised bed for better soil drainage. What is Causing Rhododendron Leaves to Brown and Curl? Burnt rhododendron leaves (leaves that appear burned, This could happen due to the hot sun or cold winter winds. Phytophthora, the formal name for rhododendron rot, breeds in very wet soil and often occurs in locations that are naturally wet or in areas of poor drainage. rhododendron stress burn, take good care of the bushes during the growing Aside from browning leaves, the roots of infected plants are often described as mushy and dark in color. However, a plant may continue to live if the soil is aerated and drainage improvements are implemented. Damaged leaves and branches may or may not recover. Leaves This spring’s bloom was the best in a long time. This condition is caused by poor root health, improper irrigation as in over- or under-watering, drought and extreme heat exposure. Rhododendrons should be watered regularly and thoroughly so that each plant's entire root zone is mois… that curled up over the winter are protecting themselves and will likely open Rhododendrons grow best in soil that is consistently moist but never soggy. This kind of marshy areas. Discovering the cause will make treatment options much more effective, and employing basic preventive practices will enable you to avoid the problems in the future. Now the leaves are turning a rust color, curling upward, and falling off. Soil contaminated with phytophthora will continue to infect or kill rhododendron until steps are taken to eliminate the conditions that are causing the fungus to grow. But I started seeing browning of some of the leaves. Sign up to get all the latest gardening tips! Brown Rhododendron Leaves. bush for winter conditions. rhododendron shrubs in areas where the soil will drain well. Burnt rhododendron leaves (leaves that appear burned, scorched, or browned and crisp) are not necessarily diseased. triggered by excessive water. season. There are some things you can do to prevent curled, crispy rhododendron leaves and repair damaged plants. Rhododendrons encounter diseases, fungi, and climatic issues that can result in brown spots, or even entirely brown leaves. May 8, 2015 | Gardens. damage is most likely due to unfavorable environmental and weather conditions. The stresses triggered by unfavorable weather can cause: Scorch can be caused by dryness in winter. Brown spots on rhododendron leaves may not be a sign of disease. I wanted to know what is the problem and how I could fix it. In some cases, a rhododendrun may need to be transplanted to a different location in order to save it. Adequate shade will protect scorched, or browned and crisp) are not necessarily diseased. enough stress to damage leaves. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. Avoid boggy, The former is a naturally occurring phenomenon that takes place as the result of changing weather patterns and doesn't necessarily indicate a dead plant. 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