Does anyone know of a source for hardy zantedeschia (that's calla lily to you and me). I read in a garden book that hardy callas do exist but I haven't been able to find a source for them. Anyone?
If you Google for hardiness of Zantedeschia, you'll notice Plant Delights has a list of Aroid hardiness and Z. albomaculata is hardy to zone 5. Niche Gardens sells it. The nursery below sells it.