Zantedeschia sap makes an indelible mark on fabrics. The stain doesn't appear until after you've washed the garment. (The sap from crotons and banana plants produce the same effect) Absolutely nothing will shift it. When we moved here years ago there were Zantedeschias naturalised along the banks of the creek at the bottom of the garden. They pop up in different parts of the garden and are a bit of a nuisance. Here in South Australia my white leonotis (about 1.5 m tall and bushy) has been flowering for months. It really does put on the most spectacular show. It takes very easily from cuttings. Liz