The valerian plant’s medicinal value lives almost entirely in its roots. The dried underground parts, including the rhizome, roots, and stolons, contain the active compounds responsible for valerian’s calming and sleep-promoting effects. The most important of these is valerenic acid, which works on the same brain receptors that anti-anxiety medications target. Here’s how to harvest, prepare, and use valerian root in several practical forms.
Which Part of the Plant to Use
Only the underground parts of valerian (the roots, rhizome, and stolons) are used medicinally. The flowers and leaves aren’t the source of the active compounds. According to the European Pharmacopoeia, dried valerian root should contain a minimum of 0.17% sesquiterpenic acids (expressed as valerenic acid) and at least 4 ml of essential oil per kilogram. These compounds are what give valerian its characteristic strong, earthy smell and its biological effects.
Valerenic acid is the key player. It has sedative and muscle-relaxant properties, and it influences a calming brain chemical called GABA. The volatile oils in the root also contribute to its relaxant effects on smooth muscle, which is why valerian has traditionally been used for digestive cramps and menstrual pain alongside its better-known role as a sleep aid.
Harvesting and Drying the Root
If you’re growing your own valerian, the roots are typically harvested in autumn of the plant’s second year, when the active compound concentration is highest. Dig up the entire root system, shake off excess soil, and wash thoroughly.
Drying correctly is critical. High heat destroys the volatile oils and valerenic acid that make the root useful. Keep the drying temperature below 100°F (40°C) in a shaded area with good airflow. The goal is rapid drying at low temperature to prevent the active ingredients from breaking down through enzymatic or heat-related decomposition. Once fully dried, store the root in a sealed container in a cool, dark place. Storing dried root in olive oil may help maintain the stability of its active compounds over time.
Making Valerian Root Tea
Tea is the simplest preparation. Use 2 to 3 grams of dried root per cup, which is roughly one teaspoon. Bring water to a boil, then let it cool for a few seconds before pouring. Water that’s still at a rolling boil can degrade the volatile compounds you’re trying to extract. Steep for 10 to 15 minutes with a lid on the cup to trap the essential oils in the steam.
Fair warning: valerian tea tastes and smells strong. Many people describe it as earthy, musty, or outright unpleasant. Adding honey or blending with a more palatable herb like lemon balm (a traditional pairing that also appears in clinical research) can make it more drinkable.
Making a Tincture
A tincture extracts valerian’s active compounds into alcohol, producing a concentrated liquid you can dose by the dropperful. The standard approach for dried herbs is a 1:5 ratio, meaning 1 part dried root to 5 parts liquid. At this ratio, every 5 ml (about one teaspoon) of finished tincture is equivalent to 1 gram of the herb.
Since valerian’s most important compounds include volatile oils, you’ll want an alcohol percentage around 60% to extract them effectively. Lower alcohol concentrations (around 25%) are better suited for water-soluble compounds like flavonoids, but won’t pull out the essential oils as well. You can use high-proof vodka or grain alcohol diluted to roughly 60% with water.
To prepare: chop or grind the dried root, place it in a clean glass jar, pour the alcohol-water mixture over it at the 1:5 ratio, seal tightly, and store in a cool dark place. Shake the jar daily for 4 to 6 weeks, then strain through cheesecloth into a dark glass bottle. Label it with the ratio and alcohol percentage (for example, 1:5 at 60%).
Dosage for Sleep
Clinical trials on valerian for sleep have used doses ranging from 225 to 1,215 mg per day, with the most common doses falling between 400 and 600 mg of dried root or root extract taken 30 to 60 minutes before bed. Many of the well-known studies used 450 or 600 mg nightly.
One important finding: valerian generally works better with consistent use over several weeks rather than as a one-off. Studies using the whole root showed the most consistent results with repeated treatments in the range of 450 to 1,410 mg per day over 4 to 8 weeks. Evidence for single-dose effectiveness as a sleep aid is poor. So if you try it once and notice nothing, that doesn’t necessarily mean it won’t work with sustained use.
Dosage for Daytime Anxiety
Valerian isn’t only a bedtime herb. For relief of nervous tension during the day, the recommended oral dose is 400 to 600 mg of dried root or equivalent extract, taken up to three times daily. This is a different use pattern than the single nighttime dose for sleep, spread across the day to manage ongoing tension.
If you’re using tea, one strong cup (2 to 3 grams of root) roughly equals one dose. For a 1:5 tincture, about 2 to 3 ml (roughly half a teaspoon) provides around 400 to 600 mg worth of herb.
Other Traditional Uses
Beyond sleep and anxiety, valerian has a long history of use as a spasmolytic, meaning it helps relax muscle spasms. It has been used for gastrointestinal cramps and menstrual pain. Laboratory research has confirmed relaxant effects on smooth muscle in the gut, blood vessels, airways, and uterine tissue. Some people add valerian-infused oil to baths or use it in compresses for this purpose, though the strongest evidence is for oral preparations.
Valerian also pairs well with other calming herbs. Combinations with lemon balm have been studied in clinical trials for sleep, typically using 360 mg of valerian extract alongside 80 mg of lemon balm extract before bed.
Side Effects and Safety
Valerian is generally well tolerated at recommended doses. It does not appear to cause the pronounced “hangover” grogginess associated with many pharmaceutical sleep aids, which is one reason people seek it out. That said, because valerian has potential sleep-inducing effects, it should not be combined with alcohol or sedative medications. The concern is that stacking valerian with other substances that depress the central nervous system could amplify sedation unpredictably.
The taste and smell are the most common complaints. Gastrointestinal discomfort occurs occasionally. If you take any prescription medications, particularly those with sedative properties, check for interactions before adding valerian to your routine.