Making herbal medicine at home comes down to choosing the right preparation method for the plant material you’re working with and the solvent that best extracts its active compounds. The core methods are simpler than most people expect: hot water extractions (infusions and decoctions), alcohol-based tinctures, and oil-based preparations like salves. Each pulls different chemicals from the plant, so the method you choose matters as much as the herb itself.
Why the Solvent Matters
Every herb contains a mix of active compounds, and those compounds dissolve in different liquids. Water-soluble compounds come out easily in teas and decoctions. Alcohol dissolves a broader range of plant chemicals, including some that water can’t touch. Oil captures lipophilic (fat-loving) compounds, like the curcumin in turmeric, which is nearly insoluble in water. This is why drinking turmeric tea delivers far less of its key compound than pairing it with a fat source.
Choosing the wrong solvent for an herb means you’ll extract little of what makes it useful. As a general rule: water works well for gentle herbs with water-soluble compounds (think chamomile or peppermint), alcohol works for most medicinal herbs because it pulls the widest spectrum of constituents, and oil is best for herbs you plan to apply to the skin.
Infusions: The Simplest Starting Point
An herbal infusion is a concentrated tea made from lightweight plant material: leaves, flowers, and fruits. Bring water to a full boil, pour it over the herbs in a heat-safe jar or teapot, cover it, and let it steep for 20 minutes. The lid matters because it traps steam and the volatile compounds that would otherwise evaporate off.
The standard proportion is about one tablespoon of dried herb (or two tablespoons of fresh) per cup of water. After steeping, strain out the plant material. Infusions are best used the same day or stored in the refrigerator for up to 48 hours before they start losing potency and developing off flavors.
Decoctions: For Tough Plant Material
Roots, bark, dried mushrooms, and hard seeds don’t release their compounds into a simple steep. They need sustained heat. A decoction involves placing the plant material in a pot of cold water, bringing it to a boil, then reducing the heat and simmering with the lid on for 20 to 30 minutes.
Use roughly one tablespoon of dried material per cup of water, keeping in mind that some water will cook off. Strain while still warm. If you’re working with an herb that has both roots and leaves (like dandelion), make the decoction with the roots first, then pour the hot liquid over the leaves and steep them as an infusion. This way you extract compounds from both parts without overcooking the delicate aerial portions.
Tinctures: Alcohol-Based Extracts
Tinctures are the backbone of home herbal medicine because they extract a wide range of plant compounds, stay potent for years, and are easy to dose precisely. The process is straightforward but requires attention to ratios.
Fresh vs. Dried Herb Ratios
Fresh plant material contains up to 80% water. To prevent the herb’s own moisture from diluting the solvent, fresh herbs use a 1:2 ratio: 1 gram of plant material to 2 milliliters of high-proof alcohol (typically 95% or 190-proof). This concentration ensures the alcohol is strong enough to extract both water-soluble and alcohol-soluble compounds even after the herb’s water content enters the mix.
Dried herbs concentrate their active ingredients, so they need less solvent per gram. The standard ratio is 1:5, meaning 1 gram of dried herb to 5 milliliters of alcohol. The alcohol percentage drops to 50-65% (100 to 130 proof) because dried herbs benefit from some water in the solvent to rehydrate the plant cells and release their contents.
The Process
Chop or grind your herb and place it in a clean glass jar. Pour the measured solvent over the plant material, making sure it’s fully submerged with at least an inch of liquid above the herbs. Seal the jar tightly and store it in a cool, dark place. Shake it once daily for four to six weeks. The shaking redistributes the plant material and keeps extraction consistent throughout.
After the maceration period, strain through cheesecloth, squeezing out as much liquid as possible. Bottle the tincture in dark glass dropper bottles. Stored away from heat and light, a properly made tincture can last three to five years.
Dosing Tinctures
A standard glass dropper holds about 1 milliliter, which is roughly 30 drops. Most single-herb tinctures are taken one dropperful at a time, one to three times daily, though this varies significantly by herb. Larger adults may need double the standard amount, while children typically take half or less, adjusted by body size. You can mix your dose into a small amount of water or juice to dilute the alcohol taste.
Non-Alcohol Alternatives
If you want to avoid alcohol, glycerites use vegetable glycerin as the solvent. Glycerin is sweet-tasting and gentler, making it popular for children’s preparations. The tradeoff is that glycerin doesn’t extract as broad a range of compounds as alcohol does, so glycerites are generally considered less potent. The process mirrors tincture-making: submerge herbs in glycerin (often mixed with a small amount of water, typically a 60:40 glycerin-to-water ratio), macerate for four to six weeks, then strain.
Vinegar extracts, called acetum preparations, are another option. Apple cider vinegar is most common. These work well for mineral-rich herbs like nettles, where the acidity helps pull out calcium, iron, and other minerals. Vinegar extracts have a shorter shelf life than tinctures, typically six months to a year refrigerated.
Oil Infusions and Salves
Oil-based preparations are designed for external use. They’re ideal for herbs whose beneficial compounds are fat-soluble, and they serve as the foundation for salves, balms, and body oils.
Making an Infused Oil
Use dried herbs only. Fresh herbs contain water, and water in oil creates conditions for dangerous bacterial growth, including botulism. Place dried herbs in a clean, dry jar and cover with a carrier oil like olive, sweet almond, or jojoba. For a slow infusion, seal the jar and let it sit in a sunny window for four to six weeks, shaking daily.
For a faster result, use gentle heat. Place the herb-and-oil mixture in a double boiler or slow cooker and warm it to around 140°F for several hours. Penn State Extension recommends heating oil to 140°F for at least 5 minutes for quick infusions, though most herbalists keep the temperature at that range for two to four hours for a fuller extraction. Avoid higher temperatures, which can damage the oil and degrade the plant compounds.
Strain through cheesecloth into clean bottles. Infused oils keep for six months to a year when stored in a cool, dark place.
Turning Oil Into a Salve
A salve is simply an infused oil thickened with beeswax. The standard starting ratio is about one ounce of beeswax per cup of infused oil. Gently melt the beeswax into the warm oil, stirring until fully dissolved. To test the consistency, dip a spoon in the mixture and place it in the freezer for a minute. If it’s too hard, add more oil. Too soft, add more wax. Once you’re happy with the texture, pour into tins or small jars and let cool completely before capping.
Equipment and Cleanliness
You don’t need specialized equipment for home herbal medicine. Glass mason jars, a fine-mesh strainer or cheesecloth, a kitchen scale, measuring cups, a double boiler or slow cooker, dark glass bottles, and labels cover virtually every preparation method. Avoid plastic containers, which can leach chemicals into solvents, and reactive metals like aluminum, which can interact with acidic preparations like vinegar extracts.
Cleanliness is important even though you’re not operating a sterile lab. Wash all jars, bottles, and utensils in hot soapy water and let them dry completely before use. For oil-based preparations especially, any residual moisture can introduce mold or bacteria. Labeling is equally important: write the herb name, solvent, ratio, and the date you started on every jar. It’s easy to forget what’s in a brown jar of liquid six weeks later.
Safety and Herb Selection
Not every herb is safe to prepare at home. Some plants contain compounds at near-pharmaceutical concentrations that can cause serious harm. Arnica, belladonna, aconite (monkshood), and foxglove are classic examples of herbs that should not be taken internally by anyone without professional training. Foxglove, for instance, contains the same compound used in prescription heart medication, and the margin between a therapeutic and a toxic dose is razor thin.
Start with well-studied, gentle herbs that have long histories of safe home use. Chamomile, peppermint, elderberry, calendula, lemon balm, and ginger are all good starting points. When working with a new herb, research its safety profile, contraindications, and appropriate dosage before preparing it. Some herbs interact with medications, others aren’t safe during pregnancy, and a few can cause allergic reactions in people sensitive to related plants.
Accurate plant identification is non-negotiable if you’re wildcrafting (harvesting from nature). Many toxic plants closely resemble edible or medicinal ones. If you’re not confident in your identification skills, purchase dried herbs from reputable suppliers who test for contaminants and verify botanical identity.