Atomic Potpourri Herbal Incense, also referred to as “k2” or “Spice,” is a synthetic cannabis substitute that has grown in popularity recently. It is frequently sold in head shops, petrol stations, and online under the names “herbal incense” and “potpourri.” The material is a concoction of different chemical additions that are sprayed over plant materials in an attempt to replicate the effects of THC, the euphoric ingredient in marijuana.