Herb · Lamiaceae
Catnip
Nepeta cataria
Settle it into full sun and lean, dry soil, and catnip keeps an easy, low-fuss charm while your cat steals the scene.
Full sun
Every 7–14 days
59–86°F · 15–30°C
USDA 3–9
Overview
Catnip is a tough, fast-growing perennial in the mint family that belongs in the easygoing corners of a garden, the kind of planting that asks for little and gives a relaxed, cottage feel. It traces back to Eurasia and now feels at home across much of the temperate world, just as content lining a sunny path as anchoring a pot by the door. Hardy from zones 3 to 9, it carries its calm presence through cold winters and dry summers without complaint.
Its name comes from nepetalactone, the fragrant oil in the leaves that turns many cats into a happy, rolling presence wherever it grows, making it the rare plant that brings the household pet right into the garden scene. People have long folded it into a slower routine too, picking leaves for a mild herbal tea. It draws bees and other pollinators while quietly keeping a few garden pests at a distance.
Catnip suits a life that prefers ease over upkeep. It wants sun, sharp drainage, and almost no attention, and it actually fares better on neglect than on care, since rich soil and heavy feeding only make it sprawl. The single thing to mind is its habit of spreading, so the real art is simply keeping it where you want it.
Care
The short version: a sunny spot, lean and well-drained soil, and a deep drink only once the top half has dried. Shear it after bloom, feed it lightly, and give it a container if you would rather it not wander and self-seed across the garden.
Light
Catnip wants full sun to stay full and fragrant, so reserve it the brightest, most open spot in the bed or on the patio. It will manage in part shade, though too little light leaves it leggy and lax with a fainter scent that dims its appeal.
Water
Once settled, catnip is drought-tolerant and far more at ease dry than wet, which makes it a forgiving companion to a busy week. Water it deeply but only every 7 to 14 days, letting the top half of the soil dry first. Soggy ground rots it, and a wet winter bed can end it for good.
Soil
Give it average, well-drained loamy or sandy soil and resist enriching it, since it carries poor, dry ground with grace. A pH from 6.0 to 7.5 suits it well. Sharp drainage is the one indulgence it genuinely asks for.
Temperature
Catnip stays content across a broad range, roughly 59°F to 86°F (15°C to 30°C), which keeps it easy company through the year. It holds through winter in zones 3 to 9 and takes summer heat in stride.
Humidity
Ordinary household or garden air, somewhere around 30% to 60%, is all it asks, so it needs no special staging. Far more telling is airflow, since still, crowded settings invite powdery mildew to dull the leaves.
Feeding
Keep feeding to a whisper, a light touch of balanced fertilizer or compost in spring if anything at all. Lay it on and you trade the scent and a tidy shape for soft, floppy growth that loses its poise.
Pruning
Once the first flush of bloom fades, shear the plant back by one-third to one-half to coax a rebloom, hold a compact form, and curb self-seeding. In late fall or early spring, cut the spent stems to the ground to close the season cleanly.
Repotting
Lift and divide clumps every 2 to 3 years to keep them looking their best, and repot container plants in spring. Roots circling the pot, smaller leaves, water slipping straight through, and a woody, crowded center all signal it is time.
Size & spacing
Catnip rounds into a clump about 24 to 35 inches (60 to 90 cm) tall and nearly as wide, a tidy mound that fills a border or a generous pot. Allow each plant that much room so air moves freely and mildew stays away.
When to plant
Catnip keeps an unhurried seasonal rhythm tied to the spring frost, much like the herbs beside it. Start seed indoors in late winter, set the plants out once the cold has lifted in mid to late spring, and enjoy the flowers from late spring through summer. For the fullest scent in the kitchen, gather the leaves just as the buds appear.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: 6-8 weeks before the last spring frost
- Plant: After the last spring frost, in mid to late spring
- Harvest: White-to-pale-lavender, purple-spotted flowers from late spring through summer; harvest leaves just before or at flowering for peak aroma
Hardiness
USDA hardiness zones: 3–9
Temperature: down to -40°C
Troubleshooting
Catnip rarely disrupts the calm of a garden, and almost everything that troubles it is cosmetic. The familiar few are cats roughing up the stems, a relaxed flop once flowering ends, and seedlings appearing well past their bed. Match what you see below, and order is usually restored with little effort.
Volunteer seedlings drifting across the planting
Catnip is a generous self-seeder that also edges outward on short rhizomes into spreading colonies, so stray seedlings beyond their bed are no surprise. Shearing or deadheading before the seeds ripen keeps it within its lines, and lifting the young volunteers while they come up easily tidies the rest. For a garden meant to stay orderly, a handsome container settles the matter.
Fix:
- Deadhead or shear before seed set
- Pull or hoe volunteer seedlings while young
- Grow in a container to contain spread
Stems flattened and the clump pressed down
A patch that looks trampled is usually just cat damage, and it comes with the territory of growing this plant. The nepetalactone invites cats to roll, rub, and chew, and a passing storm or stiff wind can lay the soft stems down as well. Tuck a discreet cage around a young or showpiece plant until it firms up woody, and let a few sacrificial clumps off in a corner take the wear.
Fix:
- Protect young or prized plants with a wire cloche or low cage
- Plant extra clumps so cats can use some freely
- Stake or surround floppy stems for support
Foliage yellowing, stippled, or veiled in white
When the foliage loses its fresh look, a few culprits could be at work. Aphids crumple the new growth, spider mites fleck the leaves through a hot, dry stretch, and powdery mildew drapes a pale film over plants set too close in still air. A firm rinse of water clears the pests, insecticidal soap settles the stubborn ones, and a little more breathing space around the planting lifts the mildew.
Fix:
- Hose off pests with a strong jet of water
- Apply insecticidal soap or horticultural oil for aphids and mites
- Improve spacing and airflow and remove affected foliage for mildew
Plant grown leggy and falling open after bloom
A clump that sprawls open once the flowers pass is just settling into its post-bloom slump, and shade or too-rich soil hurries it along by encouraging weak, soft growth. Shear it back by a third to a half as the first flush fades, and it gathers itself into a neat mound again, often with a second show of bloom. A sunny spot, lean soil, and a restrained hand at feeding keep it looking composed.
Fix:
- Shear the plant back by one-third to one-half after the first bloom
- Move container plants into full sun
- Reduce fertilizer
Toxicity
Catnip is safe all around, a reassuring choice for a home shared with animals. It holds no real toxin, so cats, dogs, horses, rabbits, livestock, birds, and people can all keep its company in comfort. Cats simply meet the nepetalactone with a harmless few minutes of bliss, and for the household the leaves brew into a gentle tea.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
This is the whole charm of keeping it, and it stays gentle and safe for the household cat. The nepetalactone brings on a brief, harmless lift, so a cat may roll, rub, lick, and shake its head for about 10 minutes before drifting back to its day. The only excess to watch is a feast of leaves, which can bring a little passing vomiting or loose stool.
Dogs None
The family dog takes no real interest in catnip. Most pass it by entirely, and a stray nibble leaves them none the worse.
Horses None
A horse may graze catnip with nothing to fear. It belongs to the mint family and carries no toxin to trouble them.
Rabbits None
Rabbits do well with catnip in the small portions they would nibble. As with any fresh green, ease them into it rather than offering a sudden large helping.
Livestock None
Cattle, goats, and sheep can browse catnip safely. There is no compound in it that would poison them.
Birds None
Pet and backyard birds are at ease around catnip, and many take no notice of it at all. The leaves hold nothing that could harm them.
People None
For the household, catnip is a cherished old kitchen and tea herb, brewed into a mild and pleasant cup. The leaves are safe to handle and to drink, and the scent simply does not stir people the way it stirs a cat.
Smelling or eating catnip causes a temporary euphoric response in many cats (rolling, rubbing, head-shaking, drooling, vocalizing) lasting roughly 10 minutes, after which the cat loses interest; this behavioral effect is harmless, while eating very large amounts may cause mild, transient vomiting or diarrhea. The aroma is harmless to people.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
United Kingdom
Animal PoisonLine: 01202 509000 (fee applies)
Australia
Animal Poisons Helpline: 1300 869 738
Varieties
Most gardens keep to plain catnip, yet one named selection is worth a place on the list.
Nepeta cataria 'Citriodora'
Lemon catnip lends a bright lemon note that rides above the familiar minty catnip scent.
How to propagate
Catnip multiplies with hardly any effort, which suits a low-key gardening life. Raise it from seed, divide an aging clump, or root a cutting, and more often than not it spares you the task and seeds itself.
SeedEasy
Sow indoors 6-8 weeks before the last frost, or direct sow in spring · 10-20 days to germinate; harvestable within the first season
Seed is the natural starting point. Begun indoors 6 to 8 weeks before the last frost, or sown straight outside in spring, it rises in 10 to 20 days and offers leaves to gather that very first season. Once at home in the garden, catnip reseeds with a free hand, often beyond what was planned.
DivisionEasy
Spring or early fall · 2-4 weeks to re-establish
Lifting and parting an established clump in spring or early fall renews a tired plant and yields more for the cost of nothing. Each section re-roots within 2 to 4 weeks. Repeating this every few years spares the clump the woody, hollow center that age brings.
Stem cuttingsModerate
Late spring to summer, from non-flowering shoots · 2-3 weeks to root
Softwood cuttings taken from non-flowering shoots in late spring or summer settle into a moist, well-drained mix under high humidity and root in 2 to 3 weeks. It calls for a touch more attention than seed or division, placing it as the most demanding of the three.
Myths
Catnip is a dangerous, addictive drug that gets cats high.
The nepetalactone stirs only a brief behavioral moment, not a genuine high, and it forms no habit. The effect fades in about 10 minutes, after which a cat turns indifferent to it for a while before it can charm them again.
Every cat goes wild for catnip.
The response is written in the genes, so only about half to two-thirds of cats respond to it at all. Kittens under roughly 3 months and a fair number of grown cats remain unmoved, which is entirely usual.