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Aucuba (spotted laurel) is recommended for its robustness and ability to grow in dry, shaded sites. However, despite this reputation, Aucuba can become stressed such as when its roots become waterlogged during cold, wet winters, for example, and as a result the leaves and shoot tips turn black.
Common name Aucuba blackeningPlants affected All cultivars of AucubaMain causes Waterlogging during cold, wet winter Timing Winter
The leaves (and shoot tips) develop moist blackened areas. There is no evidence that a pest or disease causes this and there is no need to apply pesticides.
The blackening of the leaves is usually caused by root stress due to excess moisture levels in the soil during cold, wet winters. Other forms of stress, including root diseases (mainly phytophthora root rots) might also be involved.
There are no chemicals to control (or prevent) Aucuba blackening. If it happens in your garden do the following:
To prevent Aucuba blackening, try the following:
Brown leaves on woody plantsFrost damageGardening on wet soilsLaurel: leaf diseasesPhotiniaWaterlogging and floodingWhy has my tree or shrub died?Wind scorch
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