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The seeds and leaves are mildly poisonous for people and animals, but are readily eaten by birds. [187] Rhododendron spp. azalea: Ericaceae: All parts are poisonous and cause nausea, vomiting, depression, breathing difficulties, and coma, though it is rarely fatal.
Azalea leafy gall can be particularly destructive to azalea leaves during the early spring. Hand picking infected leaves is the recommended method of control. [4] They can also be subject to Phytophthora root rot in moist, hot conditions. [5] Azaleas share the economically important disease Phytophthora cinnamomi with more than 3000 other plants.
Some species of rhododendron are poisonous to grazing animals because of a toxin called grayanotoxin in their pollen and nectar. People have been known to become ill from eating mad honey made by bees feeding on rhododendron and azalea flowers.
Most are in the United States, with one species found in Canada and one being found in Mexico. North American azaleas are commonly confused with azaleas of Asian origin, the evergreen azaleas. North American azaleas are deciduous and produce two types of buds. One is a larger and produces about 20 flowers while the other bud produces a leafy ...
Azaleas put on quite a show in the spring if they have been protected well during winter. Learn how to protect azaleas in every hardiness zone in winter.
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Azalea bushes are easy to grow and add loads of color to a front yard or garden. Here's how to plant and grow azaleas.
Rhododendron arborescens, also known as smooth azalea [1] or sweet azalea, is a species of flowering plant in the family Ericaceae, native to the eastern seaboard of the United States. It grows to a height of 2.4–3 metres (8–10 ft). Generally blooming in late spring and early summer, the flowers range in color from white to pink with red ...