A genus of low to medium growing tuberous perennial plants. Of the 25 or so species generally recognised, only a handfull are grown for their showy spathe or glossy, arrow-shaped leaves. If left alone in the garden some species will form quite large clumps and seedlings and end up being a nuisance. One that fits this category is A. italicum. Really pretty patterned appearance on its leaves and ok if you have a large area to cover but not good in suburbia. The common Arum lily often highlighted by those that dislike arums is not actually an Arum. It actual name is Zantedeschia aethiopica. And yes once established is very difficult to get rid of.
Most arums are fairly tolerant of different soils types, although they do best in soils that includes a high component of organic matter. In Tassie we can grow them in full sun; however, in hotter regions part shade is best.
Our research indicates that the var. leopoldtii may be an invalid name. Further research is required. We purchased seed of this plant in 2012 and so far the leaves are true to A dioscoridis. Time will tell if it goes on to produce a spathe that is almost entirely black with purple spotted edges. We have placed this plant in well drained soil in a sunny to partially shaded spot with protection from the midday sun.
We have a few available from the nursery.