The tender forms of Zantedeschia are mainly cultivars of Z. elliottiana and Z. rehmannii (also called Elliottiana hybrids and Rehmannii hybrids), but may also include Z. albomaculata and Z. jucunda. These are often referred to as calla lilies. These can be recognized by different flower colors other than white and spotted leaves. These species and their cultivars are not so adaptable to soggy soil and can't stand frost. They are best grown in well-drained situations like in a flower bed with perennials and annuals or in a container. Treat as annuals or dig/move the bulbs indoors at fall before the cold weather sets in.Thanks to plant breeding, there are also hybrids of these two groups which can be hard to tell. Check with a website or plant expert for specifics.
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