Mature size & growth rate

How big does French tarragon (Artemisia dracunculus) get?

Also called French tarragon, estragon.

About French tarragon

Artemisia dracunculus · also called French tarragon, estragon · herb

French tarragon is a perennial herb grown for narrow anise-flavoured leaves used in French cuisine. True French tarragon is sterile — must be propagated from cuttings or divisions, never seed. Russian tarragon (A. dracunculoides) is seed-grown but flavourless. Mildly toxic to pets.

French tarragon is the culinary clone of Artemisia dracunculus (Asteraceae), a species native to southern Russia and western Asia; the 'Sativa' selection is a sterile cultivar that rarely sets viable seed.

Because the sterile 'Sativa' clone does not come true from seed, it must be propagated by division or stem cuttings; divide clumps every 3-4 years to keep the planting vigorous.

Mature size: 60-90 cm tall

Sources: extension.illinois.edu, plants.ces.ncsu.edu, missouribotanicalgarden.org

Indoor size vs how big it gets in the wild

French tarragon grows into a room-scaled plant of roughly 60-90 cm tall — bigger than a tabletop plant, but not a tree. Indoors and in a pot, expect 60-90 cm tall. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

It builds steadily in both height and spread to a medium, manageable size, filling a pot and a corner over a few years.

Growth rate and years to mature

French tarragon is a moderate grower. Realistically, expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Its feeding profile backs this up: compost in spring; minimal additional feeding.

Want this turned into the right next pot at the right moment? The pot size calculator and the french tarragon repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast french tarragon grows.

How to keep french tarragon smaller

You are not stuck with the maximum size. For french tarragon specifically, these are the levers, in order of impact:

Prune the tallest or longest growth back to a node to hold french tarragon at the size you want.
Keep it slightly pot-bound and feed sparingly to cap the overall size.
Remove the largest or oldest leaves to keep the footprint in check.

How to grow french tarragon bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for french tarragon the accelerators are:

It already has good light; a yearly pot-up plus spring-summer feeding drives the fastest growth.
Pot up a size every year or two while it is establishing.
Feed and water consistently through the growing season for steady, faster size gain.

Light is almost always the ceiling. The french tarragon light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When french tarragon outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for french tarragon:

It crowds the shelf or corner it lives in and starts leaning for light.
Roots circling the pot base or escaping the drainage holes.
It needs a noticeably bigger pot every year — a sign to pot up, divide, or prune.

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the french tarragon repotting guide. If you want more of this plant instead of a bigger one, the french tarragon propagation guide turns prunings into new plants.

French tarragon size — frequently asked questions

How big does french tarragon get?

French tarragon reaches 60-90 cm tall when grown indoors. It builds steadily in both height and spread to a medium, manageable size, filling a pot and a corner over a few years.

Is french tarragon slow or fast growing?

French tarragon is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. French tarragon grows into a room-scaled plant of roughly 60-90 cm tall — bigger than a tabletop plant, but not a tree.

How long does french tarragon take to reach full size?

Roughly three to six years to reach mature indoor size, gaining a steady amount each growing season. Light, pot size and feeding move that timeline more than anything else.

How do I keep french tarragon smaller?

Prune the tallest or longest growth back to a node to hold french tarragon at the size you want. Keep it slightly pot-bound and feed sparingly to cap the overall size. Remove the largest or oldest leaves to keep the footprint in check.

How can I make french tarragon grow bigger or faster?

It already has good light; a yearly pot-up plus spring-summer feeding drives the fastest growth. Pot up a size every year or two while it is establishing. Feed and water consistently through the growing season for steady, faster size gain.