I apparently do not own even one tiny shamrock stamp so I had to improvise this year. I just grabbed that "Love You Much" stamp set (the one you bought with the Valentine's Bundle!) and dipped those hearts in green! I used "Glorious Green" in this example, but "Garden Green" is another good St. Patrick's green as well.
I am aware that four leaf clovers are luckier than three, but I liked the way this one looked better!