The magnificent flowering plants we call amaryllis, so popular as indoor plants during the holidays, really aren’t in the genus Amaryllis but rather Hippeastrum. True amaryllis are from South Africa and many of us grow them here in South Carolina, calling them Naked Ladies or sometimes Resurrection lilies as they bloom after their leaves have appeared, photosynthesized and gone dormant. I never remember exactly where the ones in my yard are and it is a yearly surprise when the flower stalks pop up and display a lovely pink bloom. What we call amaryllis, but actually in the genus Hippeastrum, are native to tropical areas of the Americas. Both can be grown outside in the warmer parts of South Carolina, when planted at the right time of year, they will multiply and give your years of pleasure.
Amaryllis plants are not really amaryillis

SC Public Radio