(80-90 days. Nepeta cataria) You’ll probably grow catnip for your feline friends, but end up liking it so much yourself it will become a permanent fixture in your garden! Catnip (also called catmint or true catnip) is a tall, coarse, perennial herb with gray-green leaves and soft lavender-blue blooms, both of which are fragrant. The leaves can be used in salads, sauces, teas, and soups, and also have medicinal properties – just ask your cat! Vigorous and high yielding, catnip can be planted inside or out; if outside it will spread in your beds or borders, thriving in poor, dry, sandy, or hot soils, blooming all summer and returning reliably for years!