Answer: Mandevilla is so beautiful, I'm very jealous of your mother! Just can't grow it where I live....oh well, enough whining! Mandevilla does best in full sun with very fertile, moist but well drained soil. Mandevilla is cold hardy to about 25F, in areas where the winters are colder than that Mandevilla should be potted up in late fall and brought indoors. Mandevilla usually won't bloom indoors though unless it is in a spot like a solarium.
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