Bitter herbs are the plants whose taste does the work. Herbalists use the phrase for wormwood, gentian, dandelion root and their kin, herbs whose bitterness on the tongue is the signal that sets digestion in motion, and "bitters" for the small bottles of tincture made from them. The same two words also name the maror of the Passover Seder, a different subject with a different plant list, and this guide covers both. At La Ferme À Ciel Sur Mer we grow wormwood in its grand and Roman forms, angelica root and hyssop, and dig dandelion root from our own fields.
The action is the subject here. Wormwood as a crop belongs to our wormwood growing guide, and the rest of the herbal vocabulary is gathered in our guide to herbal actions, alongside companion pieces on nervine herbs and demulcent herbs.
What "Bitter Herbs" Means
In herbalism a bitter is defined by taste rather than by any single chemical. Wormwood owes its bitterness to sesquiterpene lactones, absinthin above all; gentian to iridoid glycosides; dandelion root to a different set of lactones again. The tongue reads them all the same way. In the words of the reference site Herbal Reality, "bitters stimulate digestion by enhancing digestive secretions such as saliva, gastric acid and bile", and Health Canada's monographs say the same herb by herb: dandelion root is traditionally used "to help increase bile flow", angelica root "to aid digestion (stomachic)".
Herbalists sort the group by what else the herb brings. A simple bitter such as gentian or wormwood is bitter and little else, while an aromatic bitter such as angelica, hyssop or chamomile carries essential oils that warm and settle the stomach as well. Every list starts with gentian (Gentiana lutea), a slow Alpine root we do not grow; artichoke leaf, burdock root, chicory root, centaury and hops fill out the longer lists.
How Bitter Herbs Work
The classic explanation is a reflex. Bitter compounds land on taste receptors, the receptors signal the brain, and the vagus nerve tells the stomach, liver and pancreas that food is on its way, so saliva, gastric juice and bile start to flow before the first mouthful arrives. This is why herbalists insist that bitters be tasted, not swallowed in a capsule. A 2015 review in Evidence-Based Complementary and Alternative Medicine tested the point: gentian and wormwood tasted by mouth changed gut circulation in healthy adults within minutes, while the same herbs in capsules did nothing measurable. The authors concluded that bitters "facilitate rather than stimulate digestive activity".
The newer science is about the gut itself. The tongue's bitter receptors, the TAS2R family, also line the stomach and intestine, and a 2020 review from the University of Leuven summarises that they "control the secretion of appetite regulating gut hormones and influence hunger and food intake". None of this is a trial of a herbal bitter. The European Medicines Agency accepts wormwood as a traditional remedy "for temporary loss of appetite" and "for mild dyspeptic/gastrointestinal disorders", and dandelion root for "mild digestive disorders".
Wormwood: The Bitterest Herb We Grow
Wormwood (Artemisia absinthium, of the daisy family) is the reference bitter of European herbalism and the most bitter plant in our fields. Its main bitter compound, absinthin, is a fraction of one percent of the dried herb and still enough to make wormwood tea a bracing cup. Health Canada caps the thujone in its essential oil at 6 mg a day for adults in a health product, to be "determined for each batch", and the European monograph carries the same ceiling and recognises two traditional uses, loss of appetite and mild digestive upset, for adults only and for no longer than two weeks.
We grow both wormwoods side by side in Charlevoix, certified Organic, cut just before flowering when the essential oil peaks and dried at low heat. Roman wormwood (Artemisia pontica) is the gentler of the two, rounder in the mouth, and the one we would suggest for a first bitter tea. Most of our wormwood goes to distilleries and bitters makers; that side of the plant lives in our profile of Roman wormwood and our guide to buying wormwood.
Dandelion Root, Angelica Root and Hyssop
Dandelion root (Taraxacum officinale) is the bitter most people have already met, usually as a roasted, coffee-coloured brew. Most of ours comes up on its own between our crop rows, and the crew lifts it with a root digger; in 2026 most of the roots came out in June and early July. Health Canada's monograph gives the root the longest list of traditional uses in this post: "to help increase bile flow", "to help stimulate appetite", to relieve "digestive troubles", and as a diuretic. Herbalists note that the root's inulin, a starchy sugar, rounds off some of the bitterness, so a spring-dug root tastes more bitter than an autumn one. It leads our post on medicinal weeds.
Angelica root (Angelica archangelica) is the aromatic bitter of the group, warm and musky where wormwood is cold and sharp, and a fixture in bitters and liqueur formulas. Health Canada lists it as traditionally used "to aid digestion (stomachic)" and "to help relieve flatulent dyspepsia (carminative)"; our post on angelica uses covers the rest. Hyssop (Hyssopus officinalis) sits at the edge of the group, "a warm bitterness with notes of mint, sage and lavender" in Herbal Reality's words, and herbalists reach for it in respiratory blends more than digestive ones.
Bitter Herbs in the Bible and at the Seder: Maror
None of the herbs above is a Passover bitter herb. In Exodus 12:8 the Passover lamb is eaten "along with bitter herbs, and bread made without yeast". The Hebrew word is maror, and the Mishnah (Pesachim 2:6) names five plants that satisfy it, led by lettuce and endive or chicory: bitter salad greens, not medicinal roots. Sephardi and Mizrahi families still put romaine lettuce on the Seder plate; Ashkenazi communities, settled where lettuce was scarce in early spring, adopted horseradish. The bitterness recalls the bitterness of slavery in Egypt.
Wormwood does appear in the Bible, but as a figure of speech rather than a food. The Hebrew la'anah, rendered "wormwood" in older English Bibles, stands for bitterness and grief in Deuteronomy, Proverbs, Jeremiah and Lamentations, and in Revelation 8:11 "the name of the star is Wormwood". Hyssop, the bunch that marked the doorposts at the first Passover, has its own post on hyssop in the Bible.
How to Take Bitter Herbs
The rule that follows from the science is simple: taste them. Herbalists take bitters a few minutes before a meal, either as a small cup of bitter tea (a pinch of dried wormwood or Roman wormwood, or a short simmer of dandelion or angelica root, drunk warm and unsweetened) or as a bitters tincture, a few drops in a little water or straight on the tongue. The tincture is where the word "bitters" comes from.
A simple bitters is one of the easiest things to make at home: dried wormwood or Roman wormwood with dandelion or angelica root and a strip of dried orange peel, covered with a spirit of about 40 percent alcohol and left in a dark cupboard for two to four weeks before straining into a dropper bottle. Ratios and the glycerite alternative are in our guide to tinctures and the wider guide to making herbal remedies at home.
A Note on Safety
Wormwood carries the strictest cautions, and they come from thujone, the compound in its essential oil. Health Canada caps thujone from a health product at 6 mg a day for adults; the European monograph sets the same ceiling, does not recommend wormwood "during pregnancy and lactation" or for anyone under 18, contraindicates it in "obstruction of the bile duct, cholangitis or liver disease", and limits use to two weeks. Both wormwoods are to be avoided in pregnancy and breastfeeding and by people with seizure disorders, and wormwood essential oil should never be ingested. Roman wormwood is sometimes sold as thujone-free, but published analyses show variable thujone from batch to batch, so the same rules apply to both.
Health Canada asks you to see a practitioner before using dandelion "if you have a liver or biliary disorder or an intestinal obstruction", and the European monograph adds gallstones. Angelica's monograph says "Do not use if you are pregnant" and warns to "avoid prolonged exposure to sunlight" while using it, since its furocoumarins can sensitise the skin. Hyssop should be avoided in pregnancy, breastfeeding and seizure disorders because of the pinocamphone in its oil. Wormwood and dandelion are daisy-family plants, contraindicated for anyone allergic to that family. If you take prescription medication, ask your pharmacist before adding a bitter. Throughout this guide we describe how these herbs are traditionally used; none of them is a remedy for any disease.
Frequently Asked Questions
What are bitter herbs?
In herbalism, bitter herbs are plants whose bitter taste is traditionally used to stimulate digestion before a meal; wormwood, gentian, dandelion root, angelica root and artichoke leaf are the classic examples. In the Bible and at Passover, "bitter herbs" means the maror of the Seder plate, usually horseradish or romaine lettuce.
What is the most bitter herb?
Gentian root is the reference bitter of European herbalism, and wormwood is the most bitter herb we grow. Roman wormwood is the gentler of our two wormwoods.
What are the bitter herbs for Passover?
The Mishnah names five plants, led by lettuce and endive or chicory. Today Sephardi and Mizrahi families use romaine lettuce and Ashkenazi families use horseradish. Medicinal bitters such as wormwood are not used as maror.
How do you take bitter herbs?
A few minutes before a meal, as a small cup of bitter tea or a few drops of a bitters tincture in a little water, tasted rather than swallowed in a capsule, since the taste sets the reflex off.
Can you take bitter herbs every day?
It depends on the herb. The European monograph on wormwood limits it to two weeks and to adults, because of thujone; dandelion root has a longer record of everyday use, with cautions for gallbladder and bile-duct conditions. Ask a practitioner if you take medication.
Want to learn more? Check out our other guides on bitter herbs and how they are used:
- Understanding Herbal Actions: A Guide to Herbal Healing and Plant-Based Support
- How to Grow Wormwood for Homemade Absinthe: A Distiller's Herb Guide
- How to Make Herbal Remedies at Home: Infusions, Decoctions, Tinctures, Salves & Oils
Interested in knowing more about what's going on on the farm? Our occasional emails bring you stories from the field, new herbs for sale, and herbal insights. Browse our Organic herbs or sign up for our newsletter to stay connected.