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Dried vs. Fresh Tarragon: Why Drying Costs So Much Flavor

By · Reviewed · 15 sources

Dried tarragon vs fresh tarragon

Tarragon is one herb where dried is a real compromise. It’s the same leaf of Artemisia dracunculus either way, but its flavor is quickly lost when the leaves are dried, and in one storage study, leaves dried at 90 °C lost about half their essential oil within 30 days.1 Use fresh whenever you can. Dried tarragon still has its uses, mostly in long-cooked dishes where it’s one flavor among several.

Side by side

Fresh tarragonDried tarragon
PlantArtemisia dracunculus L.The same plant
FamilyAsteraceae (daisy family)Same
Native rangeTemperate Northern Hemisphere to tropical mountains (Kew); PROSEA says the origin is uncertain, possibly Siberia23Same
Which tarragonFrench tarragon, the cooking type. Seed sold as tarragon is Russian tarragon, which lacks French tarragon’s smell and flavor;4 a 2011 review says Russian tarragon lacks the anise-like taste5No source opened for this page says which type retail dried tarragon is made from
Key aroma compoundEstragole (methyl chavicol), 60–75% of tarragon oil6Same compound; how much survives depends on drying and storage (see below)1
FlavorSweet, anise-like scent and a peculiar bittersweet flavor (PROSEA); licorice or anise (Illinois)Flatter and grassier, with less anise
Strength by volumeGeneral herb rule: 3 parts fresh71 part dried; the rule fits hardy herbs better than tarragon (see below)87
Best forBéarnaise, egg and chicken dishes, vinegars, dressingsStews, braises and sauces with other herbs
StorageRefrigerate or freezeSealed, dark and dry; loses oil in storage (see below)1
RegulationNo herb-specific limit foundThe EU caps pyrrolizidine alkaloids in dried herbs, tarragon included, at 400 µg/kg9

For the plant itself, including the French and Russian types, see tarragon.

Why dried tarragon disappoints

Tarragon’s anise note comes from its essential oil. The European Commission’s Scientific Committee on Food puts estragole at 60 to 75 percent of tarragon oil,6 and PROSEA reports about 77 percent methyl chavicol (another name for estragole) in one French tarragon oil.3 That flavor fades fast when the leaves are dried.

A 2007 study shows how much drying and storage matter. Researchers dried tarragon leaves at 45, 60 and 90 °C, then measured oil content right after drying and again after 15, 30, 60 and 120 days of storage.1

  • Oil content dropped during storage for every drying condition.
  • Leaves dried at 90 °C changed most, losing about half their essential oil within 30 days.1
  • Drying at 45 °C gave the smallest losses.

PROSEA’s advice for commercial drying lines up: dry tarragon in the shade or in dryers that stay at or below 43 °C.3 The study measured oil, not taste, and didn’t test retail jars. Still, the practical takeaway is clear enough. A jar of dried tarragon that’s sat open for months has probably lost a lot of what made it tarragon. Crush a pinch and smell it before you count on it.

How much to use

Ratio (Attributed): The general herb rule is 1 teaspoon dried for 1 tablespoon fresh, from LSU AgCenter, NDSU and Penn State,71011 and the University of Delaware’s guide gives 3/4 to 1 teaspoon dried for 2 to 3 teaspoons fresh.12 America’s Test Kitchen tested the same proportion and found 1 part dried to 3 parts fresh came closest to equal strength. But its tasters preferred fresh herbs in all but one application, and ATK’s long-cooking wins were with hardy herbs like oregano, rosemary, sage and thyme, not tarragon.8 We found no source with a measured conversion for tarragon itself.

  • Dried for fresh: start with 1 teaspoon dried per tablespoon of fresh, add it in stages, and taste. Dried tarragon loses oil in storage,1 so an older jar may need more.
  • Fresh for dried: start with the general rule’s 1 tablespoon of fresh per teaspoon of dried, then adjust. Fresh tarragon is assertive, so add it gradually.

When to use each

Fresh tarragon is the one for the classic French uses. It’s an essential ingredient in béarnaise, and one of the herbs commonly found in fines herbes, with parsley, chives and chervil. The leaves particularly suit chicken, egg and lobster dishes, and tarragon vinegar is made by adding the herb to wine vinegar. Try it in vinegars, oils, marinades and salads too. ATK counts tarragon among the delicate herbs with more volatile flavor compounds, and those go in at the end of cooking or into food that isn’t cooked at all.

Dried tarragon works best as a background herb. Put it in a stew, a braise or a creamy soup with other herbs, where the missing top notes matter less. Delaware’s guide counts French tarragon among its medium-strength herbs, at about 1 to 2 teaspoons for six servings. Its general advice for long simmering is to add herbs in the last 45 minutes.12

Can one stand in for the other?

Only partly. Fresh can always replace dried, using the ratio above. Dried in place of fresh works in cooked dishes but falls short where tarragon is the main flavor, as in béarnaise, a tarragon vinaigrette or chicken salad.

If the recipe really needs fresh tarragon and all you have is dried, a different fresh herb may do better. A Couple Cooks calls fresh basil the best fresh tarragon substitute,13 and the Scientific Committee on Food puts estragole at 20 to 43 percent of sweet basil oil,6 which helps explain the overlap. Tarragon substitutes ranks the options by the job tarragon is doing, with each ratio’s treatment shown.

What isn’t known

  • We found no measurement of a conversion for tarragon specifically. The 1-to-3 rule is a general herb rule.
  • The storage study gives a figure (about 50% oil loss in 30 days) only for leaves dried at 90 °C. The smaller losses at lower temperatures aren’t quantified in the abstract we read.1
  • We found no measurement of oil content in retail dried tarragon, and no shelf-life figure from a regulator or extension service.
  • No source opened for this page says whether retail dried tarragon is French or Russian tarragon.

Footnotes

  1. Arabhosseini et al., “Long term effects of drying conditions on the essential oil and color of tarragon leaves during storage”, Journal of Food Engineering, 2007 (abstract). agrar.uni-hohenheim.de · Peer-reviewed ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7

  2. Artemisia dracunculus L., Plants of the World Online, Royal Botanic Gardens, Kew. powo.science.kew.org · Reference work ↩

  3. C.C. de Guzman & R.A. Reglos, Artemisia dracunculus, Plant Resources of South-East Asia (PROSEA). uses.plantnet-project.org · Reference work ↩ ↩2 ↩3

  4. “Tarragon: French”, University of Illinois Extension. extension.illinois.edu · Reference work ↩

  5. Obolskiy et al., “Artemisia dracunculus L. (Tarragon): A Critical Review”, Journal of Agricultural and Food Chemistry, 2011. discovery-pp.ucl.ac.uk · Peer-reviewed ↩

  6. Opinion of the Scientific Committee on Food on Estragole, European Commission, 2001. food.ec.europa.eu · Regulator ↩ ↩2 ↩3

  7. “Flavorful Herbs”, LSU AgCenter. lsuagcenter.com · Reference work ↩ ↩2 ↩3

  8. “Science: Substituting Dried Herbs for Fresh”, America’s Test Kitchen. americastestkitchen.com · Publication ↩ ↩2

  9. Commission Regulation (EU) 2023/915, Annex I, section 2.4. eur-lex.europa.eu · Regulator ↩

  10. Julie Garden-Robinson, Ingredient Substitutions (FN198), NDSU Extension, 2018. ksre.ksu.edu · Reference work ↩

  11. Stacy Reed, “Preserving Herbs by Drying”, Penn State Extension, 2024. extension.psu.edu · Reference work ↩

  12. “Using Herbs and Spices”, University of Delaware Cooperative Extension, 2025. udel.edu · Reference work ↩ ↩2

  13. Sonja Overhiser, “Best Tarragon Substitute”, A Couple Cooks. acouplecooks.com · Publication ↩

Also drawn on

  • Tarragon (Britannica Editors, updated 8 Oct 2026), Encyclopaedia Britannica. britannica.com
  • Fines herbes, Encyclopaedia Britannica. britannica.com