I recently had "Look Here Mary' to develop root root. I dug up the plant, removed the rotted roots, rinsed it really well with a hose, then mixed up some Clorox and water and soaked the entire plant in the wheelbarrow for a few minutes then planted the three remaining fans in a pot. I placed the pot in a shady area where I could keep an eye on it. It is sending out new growth now. A ratio of 3 parts water to one part clorox is the mixture I used.
