Care Of Rex Begonias
Care of Rex Begonias. Rex begonias are considered the "kings" among the wide variety of begonias because of their strikingly colorful foliage. Rex begonia leaves vary in texture, size and shape, streaked and veined with several colors. Hardy to USDA zones 10-12, these plants are best grown indoors and require high humidity and careful tending. Rex begonias thrive in day temperatures of about 70 degrees and 60 degrees at night. They're grown more for their large, beautiful leaves than their flowers, which are tiny.
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