Zantedeschia, often known as Arum lilies or Calla lilies, are popular exotic looking plants that are native to South Africa. // -->. Texas A & M University: Q. if(MSFPhover) { MSFPnav1n=MSFPpreload("_derived/home_cmp_water010_vbtn.gif"); MSFPnav1h=MSFPpreload("_derived/home_cmp_water010_vbtn_a.gif"); } The Process to produce fruits can easily be summed up For outdoor growing, they thrive well in USDA hardiness zones 7-10, whereas there is no such limitation for indoor plantation. From planting to pruning, every bit of attention goes towards helping the growth and bloom of … 2. The flowers grow up through tightly furled leaf bases or ‘false stems’. Plants that you may know that have rhizome bulbs may include Irises and Calla Lilies. // -->