Package of 600 Seeds, Catnip Herb (Nepeta cataria) Non-GMO Seeds By Seed Needs Quality Catnip seeds packaged by Seed Needs. Intended for the current and the following growing season. Packets are 3.25" wide by 4.50" tall and come with a full colored illustration on the front side, as well as detailed sowing instructions on the reverse. Aptly named, Catnip acts as a drug to your feline friends, with the active molecule in Nepeta cataria being nepetalactone. This molecule is believed to mimic a cat pheromone. Nepetalactone binds to a cat's olfactory receptors to produce catnip's unique effects. Catnip herbs aren't harmful in any way, although the reactions and actions of your pet can differ from one to the next. Catnip herbs grow to a mature height of roughly 18 to 24 inches tall. They produce attractive, dark green foliage and blue to purple colored flowers, which will attract an array of beneficial insects to the garden. All Catnip seeds sold by Seed Needs are Non-GMO based seed products and are intended for the current & the following growing season. All seeds are produced from open pollinated plants, stored in a temperature controlled facility and constantly moved out due to popularity.