Catnip

Nepeta cataria

Catnip is a hardy perennial in the mint family, with gray-green scalloped leaves and a spreading habit familiar from many other mints.¹ In the Northeast it is easy to grow as a perennial herb: the University of Minnesota lists it as hardy through zones 4–10 and notes that it tolerates both full sun and part shade.²

The leaves have a long history as an infusion herb. Lemon catnip is a form selected for a distinct lemon aroma.¹ The plant’s most famous chemistry is nepetalactone, an iridoid found in the essential oil that triggers the characteristic response in many cats; that animal attraction is not the same thing as the herb’s food identity, which is mild, minty, and suited to a simple infusion.²³

Catnip and ornamental catmint are related but not necessarily interchangeable names. Nepeta cataria is the species most strongly associated with the characteristic feline response.

Although completely naturalized, catnip is introduced rather than native in New England. It is documented in all six states in fields, roadsides, waste ground, clearings, and deciduous woods.⁴

For food, catnip is a leafy infusion herb rather than a strongly savory seasoning. Illinois Extension notes that its flavor and aroma peak when the plant is in bloom, when the stems can be cut and dried; the coarse stems are usually separated from the leaves before storage.⁵ The lemon-scented form shows how much the aromatic profile can vary within the genus.⁵

Its mint-family habit also explains why it persists around gardens. Catnip tolerates full sun and light shade, prefers moist but well-drained soil, and can spread quickly if left unchecked.⁵ In the Northeast that combination makes it easy to cultivate, but not a reason to confuse a garden planting with a native wild herb. The flowers are also useful to pollinators, so a patch can function as both a tea herb and a small garden resource rather than being grown only for its effect on cats.²