Herb · Asteraceae
French Tarragon
Artemisia dracunculus
Set it up with full sun and sharp drainage, and French tarragon keeps delivering that warm anise punch right through summer.
Full sun
Every 5–10 days
USDA 4–8
24–35 in · 60–90 cm
Overview
French tarragon wins a place in the garden for one standout reason: a clean, warm anise flavor no other herb comes close to. It runs with the daisies and sagebrush as a hardy perennial, dying back each winter and bursting into fresh shoots every spring. Get one strong plant established and it keeps the harvests coming for years.
Here is the twist that makes it fun to grow: the true French herb is a sterile clone that sets no viable seed. That means you track it down as a living plant or grab a piece from another grower, never from a packet. Anything sold as tarragon seed is the Russian type, which shoots up fast and big but tastes of almost nothing. Snag the real thing once and you can keep splitting it for free forever after.
Tarragon cares about one thing above all: it will not stand wet roots. Set it up with full sun, lean soil, and very sharp drainage, and steer clear of heavy, wet ground where it sulks or rots. Nail that drainage and everything else falls into place, with light watering, barely any feeding, and a quick cutback before winter.
Care
The short version: load it up with full sun and lean, fast-draining soil, and water only once the top half dries out. Feed it lightly or not at all, keep snipping the shoot tips through summer, and split the clump every few years to keep the flavor firing.
Light
Give tarragon full sun to fire up the strongest flavor, though it shrugs off a little afternoon shade. Push it into deep shade and the growth thins out while the taste fades, which throws away the whole point of growing it.
Water
Let the top half of the soil dry between drinks instead of keeping it wet. Tarragon flat-out rejects soggy roots, and the quickest way to lose it is overwatering in winter, which rots the roots outright.
Soil
Get it into light, sandy, well-drained loam, because this herb chases sharp drainage over rich ground every time. A pH anywhere from 6.0 to 7.5 keeps it happy, and heavy, soggy ground is the one thing it will not take.
Temperature
Tarragon is genuinely tough, powering through cold down to about -20°F (-29°C) and heat up to roughly 84°F (29°C). It actually banks on a cold winter rest to perform, so treat that dormancy as a feature, not a flaw.
Humidity
Keep the air on the dry side, around 30% to 50%, and give the plant room to breathe. Damp, still air is what fires up the mildew and rust that spot the leaves.
Feeding
This is a light feeder, so hold back. One spring hit of balanced fertilizer or compost covers it, and piling on nitrogen just pumps out soft leaves that taste of less.
Pruning
Keep pinching and harvesting the shoot tips all season to drive bushy growth instead of leggy stems. Cut the stems back in late summer and clear off the dead top growth before the plant heads into winter.
Repotting
Refresh a potted plant every 2 to 3 years before the crown turns woody and crowded. Slumping flavor, fewer new shoots, and a hard center are the plant flagging that it wants fresh soil or a split.
Size & spacing
A mature plant shoots up to 24 to 35 inches (60 to 90 cm) tall and fans out 12 to 18 inches (30 to 45 cm) wide. Give each one that much room so air rips through freely and the leaves stay dry.
When to plant
Thriving across zones 4 through 8, tarragon runs on the seasons and rewards a grower who works with them. Get divisions or rooted cuttings into the ground in spring the moment the last frost lifts, harvest leaves all summer long, and let the plant power down for winter. That cold rest is the secret behind its strong comeback the next year.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Spring, after the last frost, from divisions or rooted stem cuttings
- Harvest: Rarely flowers and sets no viable seed; harvest leaves through summer. Benefits from a period of winter dormancy and chilling to perform well the following season.
Hardiness
USDA hardiness zones: 4–8
Temperature: down to -34°C
Troubleshooting
Nearly every tarragon problem starts in one of two places: wet roots below or stale, crowded air above. Watch both and you shut down trouble before it starts. Match your symptom below and jump on it early.
Wilting plant over black, mushy roots and a rotted crown
This is root and crown rot, and it almost always tracks back to soil kept too wet. Tarragon can't stand soggy roots, especially over winter, so lift a struggling plant and hunt for brown, foul-smelling roots. If rot has dug in, cut away the worst and replant healthy divisions in raised, sandy ground that drains hard and fast.
Fix:
- Improve drainage and reduce watering
- Remove and discard severely rotted plants
- Replant healthy divisions in raised or sandy, well-drained beds
Yellow, stippled leaves showing powdery patches or tiny insects
Crowded, humid plants pull in downy mildew or rust, which splash pale or rust-colored patches across the leaves, while aphids swarm the soft new growth and warp it. Flip the leaves to figure out which one you've got. Then open the plant up for airflow, tear off the worst foliage, and rinse or treat any aphids fast.
Fix:
- Improve air circulation and spacing
- Remove and destroy infected foliage
- Rinse off or treat aphids as needed
An old clump gone woody, thin, and flat on flavor
After three or four years a tarragon plant simply outgrows its prime, packing a hollow, woody center that pushes out little fresh growth and tastes flat. That's age at work, not disease. Dig the clump in early spring, replant the lively outer pieces, and toss the spent middle.
Fix:
- Divide the clump in early spring
- Replant vigorous outer divisions
- Discard the spent woody center
Toxicity
Great news for a household that loves to cook: tarragon is a culinary herb, safe to eat and easy to keep close in the kitchen. Reach for it freely, and know it brings no poisoning risk to pets. The one thing to keep in view is that a big helping of the strongly scented leaves can hand a cat, dog, or other animal a passing bout of stomach upset, which makes it a mild caution for pets, not a hazard.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Mild
A nibble does zero harm, but a cat that tears through a good amount of the aromatic leaves might drool a bit or ride out a brief upset stomach.
Dogs Mild
Poisoning isn't in play, though a dog that bolts a large helping of the strong-smelling foliage may hit loose stools or a touch of nausea that clears fast.
Horses Mild
Small tastes barely register. Down a lot of the leaves, though, and a horse can pick up mild digestive upset for a short stretch.
Rabbits Mild
Stick to the odd sprig, because those pungent oils can loosen a rabbit's sensitive gut the moment it gets past a small taste.
Livestock Mild
Grazing animals usually steer clear of the strongly scented plant, and a casual mouthful sparks nothing worse than passing stomach upset.
Birds Mild
A few leaves won't rattle a backyard bird, but the concentrated aromatic oils make tarragon a rare treat rather than a regular feed.
People Safe
For people, tarragon is a kitchen powerhouse and safe to eat in the amounts a recipe calls for. Its estragole only comes into play at very large medicinal doses, way past normal cooking.
No special handling precautions are needed for the intact plant; use the leaves as a culinary herb.
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
Just two tarragons cross a grower's path, and picking the right one is what separates real flavor from plain green leaves. Nail down which one you are buying before it goes in the ground.
French tarragon ('Sativa' clone)
This is the real culinary tarragon, a sterile clone packing a strong anise flavor that you grow from divisions or cuttings since it never sets viable seed.
Russian tarragon (Artemisia dracunculoides)
It rockets up from seed with ease but comes out coarser, larger, and nearly flavorless, which is why it keeps landing in seed packets and then letting cooks down.
How to propagate
Since true French tarragon never sets seed, you multiply it the way the pros do: split a plant or root a cutting. Both keep every bit of that flavor true.
DivisionEasy
Early spring as growth resumes, or early fall · 4 to 8 weeks
Division is the surest way to crank out more of the true French clone. Lift an established plant in early spring as growth kicks off, or in early fall, split off the vigorous outer sections, and replant them, doing this every 3 to 4 years to keep the clump young. The new divisions dig in and take hold within 4 to 8 weeks.
Stem cuttingsModerate
Late spring to early summer from softwood growth · 4 to 6 weeks
Snip cuttings from non-flowering softwood shoots in late spring or early summer and root them in a sharp, well-drained medium, where they get established in about 4 to 6 weeks. This locks in the prized French flavor, since only the inferior Russian tarragon ever comes from seed.
Myths
You can grow true French tarragon straight from seed.
Not a chance, and here's the catch: true French tarragon is a sterile clone that sets no viable seed, so the only way to lock in its flavor is to divide a plant or root a cutting. Any tarragon sold as seed is the inferior, nearly flavorless Russian type, not the real culinary herb.