Has anyone ever heard of dusting potatoes with powdered lime after harvesting when you want to store them for a long time. My sister in law tells me this will keep them from rotting but I don't think that sounds right. She also says you can dust tomato plants with lime to cure blossom end rot. I've never heard of that either. I know amending the soil with lime will raise the calcium level but even that doesn't work quickly..it takes time for the calcium to become available to the plant. I am curious and do not want to tell her she is wrong if she isn't.