I know how you feel about Tansy I have found it all over my yard. I was about to tear it all out but, one day I found where a mouse, or mice, were coming in under the island in my kitchen. They just walked their way up the gas pipe. Traps did not work then I decided to use some of the old strewing herbs I have planted in my gardens. I chose Tansy to start. I picked leaves and put them around where they were coming in. Much to my surprise and pleasure the mice have not been back. The Tansy stays and not only will I dry t he plant for the flowers to use in arrangements but I will also keep dried leaves a mouse deterant
I have tansy in my yard - never dies. My house is 200 years old, maybe the tansy is from the 1800's. I don't know. Anyway, someone told me that in the old days, tansy was given to young, unmarried women who found themselves pregnant, in order in make them sick enough to lose the fetus - an old form of abortion. Is this true - curious. I keep the plant because it is a connection to the past. Thanks for the information about tansy in your article. Oh, by the way, my cousin named her cat "Tansy", after my plant.