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Missouri Botanical Garden PlantFinder lists Citrus x sinensis for USDA zones 9-10 (oranges generally 9-11), full sun, and medium water, blooming March to April with white fragrant flowers, growing 8-15 feet tall and wide.
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Missouri Botanical Garden PlantFinder reports it is best grown in deep, evenly moist, well-draining, slightly acidic sandy loams and is intolerant of heavy, saturated soils; trees need protection if temperatures drop below 32F in spring, and in colder climates can be grown as a container plant moved indoors for winter.
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Missouri Botanical Garden PlantFinder notes susceptibility to pests including citrus rust mite and scales, and to diseases including citrus canker and citrus greening (Huanglongbing) - the latter a quarantine-significant disease in US citrus regions.
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Not native to North America: Missouri Botanical Garden PlantFinder describes it as originally domesticated in subtropical Asia, a hybrid of mandarin (Citrus reticulata) and pomelo (Citrus maxima) likely originating in southern China.