I'm expanding my herb garden this year...BIG as I can. I've known Pennyroyal had been used in olden times as an insect/mice repellent...but I didn't give a thought to fleas. Well....powdered dried leaves are an excellent flea repellent for your pets, and that just sounds much better to me than insecticides. Anyone use it? (yes, I know....it's not even Jan. and here I am planning garden items ) Lavender, too.........hmmmmmm...I may just have some nice smelling dogs.....................I think Ham just gave me one of those 'man' looks. LOL I'll just tell him it smells like Old Spice or something more manly.