Pink flower in hair = bad omen?

Today, I was walking and picked a pink-colored flower. As a joke, I put it in my mom's hair. Right away she said, "Don't put that pink thing in my hair, that's a bad omen!" So, of course, I threw it out right away. Then she said she was just kidding. But I was wondering... is there really a bad omen about pink flowers (or any flowers for that matter) in a girl's/woman's hair??