Lemon balm is one of the most versatile herbs you can grow or buy, with uses ranging from fresh salads and homemade jam to calming teas and cold sore remedies. Whether you have a plant taking over your garden or a bundle from the farmers market, here’s how to put it to work.
Cook With It Like Mint
The simplest rule for lemon balm in the kitchen: use it anywhere you’d use fresh mint, but expect a gentler, more citrusy flavor. It’s not as intense as lemon verbena, so you’ll want to use more of it when substituting. Add it at the end of cooking or use it raw, since heat breaks down the delicate volatile oils that give lemon balm its signature lemony scent.
Whole leaves work beautifully tossed into green salads, fruit salads, or scattered over grilled peaches with burrata. Thinly sliced (chiffonade-style), lemon balm brightens chicken salad, fish dishes, and grain bowls. It pairs naturally with cucumber, feta, dill, basil, strawberries, and stone fruit. For a summer salad that shows it off, combine radishes, sungold tomatoes, strawberries, and a generous handful of mixed herbs including lemon balm, dill, and mint.
Lemon balm also shines in drinks. Muddle leaves into a simple syrup for limeade, steep them alongside thyme for an herbal soda, or just drop a handful into a pitcher of water and let it infuse for an hour. An easy upgrade to a classic Arnold Palmer: brew black tea with fresh lemon balm, lemongrass, and lemon zest.
For preserving the flavor, try raspberry lemon balm jam, where the herb’s citrus notes complement tart berries. You can also infuse heavy cream with lemon balm leaves as a base for panna cotta or crème brûlée, candy the leaves for a crystallized garnish over ice cream, or even make a lemon balm liqueur.
Make a Calming Tea
Lemon balm tea is probably the most popular way to use this herb, and it’s dead simple. Use about one teaspoon of dried leaves (or a small handful of fresh) per cup. Bring water to around 200°F, just below a full boil, and steep for three to five minutes. You can re-steep the same leaves up to three times, though each infusion will be lighter. Fresh leaves produce a brighter, more aromatic cup, while dried leaves give a more concentrated, slightly earthier flavor.
The calming effect isn’t just folk wisdom. Lemon balm contains rosmarinic acid, a compound that slows the breakdown of a brain chemical called GABA, which plays a central role in relaxation. By inhibiting the enzyme that normally clears GABA away, rosmarinic acid lets more of it stay active in your brain. This is the same general pathway targeted by prescription anti-anxiety medications, though lemon balm’s effect is much milder.
Use It for Sleep and Anxiety
Clinical trials have tested lemon balm at a range of doses for mood and sleep. In a study of 200 adolescent females, 1,200 mg of lemon balm daily over three consecutive menstrual cycles significantly reduced anxiety, depression, and insomnia scores compared to placebo. A combination of 320 mg lemon balm with 640 mg valerian, taken daily for 28 days, improved sleep quality and restlessness. That same combination also improved concentration and reduced distractibility after seven weeks.
Even a single dose can shift things. In one trial, 300 mg of lemon balm extract (delivered in iced tea, of all things) lowered state anxiety scores and boosted working memory compared to a placebo beverage within one to three hours. If you’re drinking lemon balm tea for relaxation, a strong cup or two in the evening is a reasonable starting point, though concentrated capsules and extracts deliver higher doses.
Treat Cold Sores Topically
Lemon balm has antiviral properties that are particularly effective against herpes simplex, the virus responsible for cold sores. A standardized cream containing 1% lemon balm extract, tested in a double-blind, placebo-controlled trial, shortened healing time and prevented the infection from spreading. It also provided rapid relief from the itching, tingling, burning, and swelling that accompany an outbreak. Look for topical balms or creams listing lemon balm (sometimes labeled as Melissa officinalis) as an active ingredient, or make a strong tea and apply it to the sore with a cotton ball several times a day.
Make a Tincture for Year-Round Use
A tincture preserves lemon balm’s active compounds in a shelf-stable liquid that lasts for years. The standard approach uses fresh leaves at a 1:3 herb-to-solvent ratio, meaning one part herb to three parts liquid by weight. The solvent is typically 45% to 55% alcohol (80- to 110-proof vodka works well). Pack a jar with chopped fresh lemon balm, pour the alcohol over it until the herb is fully submerged, seal it, and let it sit in a cool dark place for four to six weeks, shaking occasionally. Strain out the plant material and store the liquid in a dark glass bottle.
A typical dose is one to two dropperfuls (about 30 to 60 drops) diluted in a small amount of water. Tinctures are convenient for travel or for times when brewing tea isn’t practical.
Support Focus and Memory
Lemon balm has a somewhat unusual profile: it calms without sedating, and at certain doses it actually sharpens cognitive performance. In a crossover trial of 20 healthy young adults, single doses of 600, 1,000, or 1,600 mg of dried lemon balm leaf were tested against placebo. The 1,600 mg dose produced the most significant improvements in both cognitive task performance and mood. A larger study of 323 older adults with mild cognitive impairment found that lemon balm extract helped prevent further cognitive decline, particularly in participants without high blood pressure.
Harvest and Preserve It
If you’re growing lemon balm, timing your harvest matters. Essential oil content peaks just before the plant flowers or right at flowering stage, typically around 160 days after planting. Harvest in the morning after the dew has dried but before the afternoon heat causes oils to evaporate.
To dry lemon balm, bundle small bunches and hang them upside down in a warm, well-ventilated spot out of direct sunlight. You can also spread leaves in a single layer on a screen or use a food dehydrator set to the lowest temperature (around 95°F to 105°F). The leaves are ready when they crumble easily between your fingers. Store dried lemon balm in an airtight container away from light. It keeps its potency for about a year.
Freezing is another option that better preserves the fresh flavor. Chop the leaves, pack them into ice cube trays, cover with water or olive oil, and freeze. Pop out the cubes as needed for teas, soups, or dressings.
Safety Considerations
Lemon balm is safe for most people at typical culinary and tea quantities. At higher supplemental doses, there are a few interactions worth knowing about. Because it enhances GABA activity, lemon balm can amplify the effects of sedative medications, including barbiturates, benzodiazepines, and sleep aids. If you take any of these, combining them with concentrated lemon balm supplements could cause excessive drowsiness.
Lemon balm also appears to influence thyroid hormone levels. Animal studies have shown it can alter thyroid function, and reviews of herb-drug interactions note that it may reduce levels of thyroid-stimulating hormone. If you take thyroid medication or have a thyroid condition, it’s worth being cautious with high-dose or long-term supplementation. Lemon balm may also interact with SSRIs and certain other medications that affect the nervous system.