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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.
Plant enthusiasts have selectively bred azaleas for hundreds of years. This human selection has produced thousands of different cultivars which are propagated by cuttings. [2] Azalea seeds can also be collected and germinated. Azaleas are generally slow-growing and do best in well-drained acidic soil (4.5–6.0 pH). [3] Fertilizer needs are low.
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 ...
It has been adapted by and to other countries (such as Canada) in various forms. A plant may be described as "hardy to zone 10": this means that the plant can withstand a minimum temperature of 30 to 40 °F (−1.1 to 4.4 °C). Unless otherwise specified, in American contexts "hardiness zone" or simply "zone" usually refers to the USDA scale.
Rhododendron occidentale is a shrub growing to 5 m tall. The leaves are deciduous, 3–9 cm long and 1–3 cm broad.The flowers are 3.5–5 cm diameter, with five lobes on the corolla; color varies from white to pink, often with a yellow blotch.
The southeast of Arizona, with New Mexico, northwest Chihuahua and northeast Sonora contain insular sky island mountain ranges, (the Madrean Sky Islands), or smaller subranges in association. There are also numerous Sonoran Desert ranges, or Arizona transition zone ranges. Northern and northeast Arizona also has scattered ranges throughout.