Before using up all your Oxalis versicolor in patio containers and the garden, consider potting up a few for indoors. They make great pot plants for sunny windowsills, conservatories and, of course, greenhouses. Oxalis can be grown indoors as a houseplant or outdoors in the garden. During the winter time in zones 3-6, be sure to bring containers indoors to enjoy your candy cane oxalis flowers all holiday season. Oxalis need bright indirect light to grow well and produce flowers. They can often bloom all winter if kept in a sunny spot. 