4" CatnipCatnip (Nepeta cataria) Catnip is a fragrant herb in the mint family thats famous for the playful reaction it triggers in many cats. The soft green leaves contain a natural compound called nepetalactone, which can stimulate excitement, rolling, rubbing, and playful behavior in cats. When grown as a plant, catnip produces small heart shaped leaves and delicate white flowers with purple speckles. Easy to grow and aromatic, catnip can be enjoyed fresh,