don't know of any other plants that give a mint taste besides mint,, mint grows wild and once you plant one plant you can't kill the stuff, it just keeps growing and showing up, I planted one mint plant out by my garden about 6 years ago for my daughter and I have used Roundup and a few more and that stuff just keeps coming up, its covering about a 30 foot area so not out of hand but could be later on, I bet someone has some mint around there, and remember there are different kinds of mint also.....