Catnip is a perennial herb native to Europe and Asia that now grows wild across much of the world, including North America. It belongs to the mint family, which explains its square stems, heart-shaped leaves, and slightly minty smell. The plant’s scientific name is Nepeta cataria, and while most people know it as a cat treat, it has a long history as a garden herb and herbal tea ingredient.
A Mint Family Member From Eurasia
Catnip is part of the Lamiaceae family, the same botanical group that includes basil, oregano, rosemary, and peppermint. Like its relatives, it produces aromatic oils in its leaves and flowers. The plant typically grows one to three feet tall, with small white or lavender flower clusters that bloom in late spring through fall. It thrives in a wide range of conditions, tolerating poor soil, drought, and cold winters, which helps explain how it spread so successfully beyond its original range.
Its native territory stretches across a broad swath of Europe and Central Asia. European settlers brought it to North America, likely as a medicinal and culinary herb, and it quickly escaped gardens and established itself in the wild. Today it grows along roadsides, in meadows, and on disturbed land across most of the United States and Canada. It has also naturalized in Great Britain, Scandinavia, Spain, the Middle East, and China.
Where Commercial Catnip Is Grown
The catnip you buy in pet stores or in dried-leaf packets doesn’t come from massive dedicated farms the way corn or wheat does. In the United States, small farmers grow limited acreage along the East Coast, in the Midwest, and in the Pacific Northwest. It’s cultivated as a garden herb, an ornamental plant, and for its dried leaves and flowers.
For larger-scale production, especially catnip essential oil, Canada has historically been the main source. Canadian producers who already grow other essential oil crops like mint have added catnip to their operations, since it thrives in similar climates and uses comparable harvesting and distillation equipment. The result is that most commercial catnip products trace back to relatively small North American growers rather than to industrial plantations.
The Chemical That Drives Cats Wild
The active ingredient in catnip is an oil called nepetalactone, concentrated in tiny bulbs on the surface of the plant’s leaves and stems. When a cat sniffs or crushes those leaves, the oil is released into the air. Nepetalactone is thought to activate the brain’s opioid reward pathway, essentially triggering a feel-good response. That’s why affected cats roll, rub their faces on the plant, purr, and sometimes zoom around the room. The reaction typically lasts about 10 to 15 minutes before the cat loses interest and becomes temporarily immune to the effect.
Not every cat responds to catnip, though. Roughly one in three domestic cats shows no reaction at all. Research pooling data from multiple studies found that about 31 to 32 percent of cats are non-responders. The sensitivity is genetic and inherited, so whether your cat reacts is determined before birth. Kittens under about six months old also rarely respond, regardless of genetics, because the trait doesn’t fully activate until they reach sexual maturity. Most large wild cats, including lions and leopards, do react to catnip, but most tigers do not.
Alternatives for Non-Responding Cats
If your cat ignores catnip, a few other plants produce similar euphoric effects. Silver vine, a climbing plant native to the mountains of East Asia, is the most studied alternative. It contains different active compounds but triggers comparable rolling and rubbing behavior, and some studies suggest it works on a higher percentage of cats than catnip does. Tatarian honeysuckle wood and valerian root also prompt responses in some cats that are indifferent to catnip. Trying one of these alternatives is a straightforward way to find out whether your cat simply lacks the catnip gene or whether it might respond to a different plant stimulus entirely.
Growing Your Own
Because catnip is so hardy, it’s one of the easier herbs to grow at home. It tolerates USDA hardiness zones 3 through 9, handles partial shade, and doesn’t need rich soil. You can start seeds indoors a few weeks before the last frost or direct-sow them outside once the ground warms up. The bigger challenge is containment: catnip spreads aggressively through self-seeding and underground runners, much like other mints. Planting it in a pot or a raised bed with barriers keeps it from taking over your garden.
Fresh leaves are more potent than dried, since the nepetalactone oil degrades over time and with exposure to light. If you’re drying it for later use, harvest the stems just as the flowers begin to open, hang them upside down in a cool, dark spot, and store the dried leaves in a sealed container. Kept properly, dried catnip retains its potency for several months.