This herb is wonderful for a repellent for mosquitos. It's in the mint family and I grow it for the scent and for making oil from it. This herb should not be eaten or consumed in any way I use the leaves for tick repellent and mosquito and gnat repellent. Crush leaves and rub on clothes. Also can make a spray for bug repellant. 2 heaping cups leaves. Store away from sunlight in a cool dry area. I also have some fresh pennyroyal if interested