Making herbal extracts at home is straightforward: you soak plant material in a solvent (usually alcohol, glycerin, or water) to pull out the active compounds, then strain and bottle the liquid. The process takes anywhere from two to six weeks depending on your method, and the results can last for years with proper storage. Here’s how to do it well, from choosing your solvent to bottling the finished product.
Choosing Your Solvent
The solvent you use determines which compounds you’ll actually pull out of the plant. Different plant chemicals dissolve in different liquids, so your choice matters more than most beginner guides let on.
Alcohol (ethanol) is the most versatile option for home extraction. It dissolves a wide range of compounds, including polyphenols, flavonoids, alkaloids, and tannins. It also acts as a natural preservative at concentrations above 20%, giving your finished extract a shelf life of several years. Vodka (40% alcohol) works for many herbs. For fresh plants or resinous materials, you’ll want something stronger, like Everclear or high-proof grain alcohol.
Vegetable glycerin is the go-to for alcohol-free extracts. It’s sweet-tasting and gentle, which makes it popular for children’s preparations. The trade-off is that glycerin doesn’t extract as broad a range of compounds as alcohol does, and glycerin-based extracts (called glycerites) typically last only 14 to 24 months, compared to several years for alcohol tinctures.
Water is excellent for pulling out highly polar compounds like polysaccharides, tannins, and certain glycosides. Tea and decoctions are technically water extracts. The limitation is shelf life: water extracts spoil quickly without refrigeration or the addition of a preservative.
Alcohol Percentages for Different Plant Parts
Not all herbs need the same alcohol strength. The general principle is that denser, more resinous plant parts need higher alcohol concentrations, while softer leaves and flowers do fine with lower ones.
- Leaves and flowers: 40 to 50% alcohol (standard vodka strength) handles most soft aerial parts well.
- Roots and bark: 50 to 65% alcohol is better for these tougher, denser materials where compounds are harder to reach.
- Resins and gums: 75 to 95% alcohol is often necessary, since resinous compounds are poorly soluble in water and need a much stronger solvent to dissolve.
- Fresh plants: 95% alcohol (like Everclear) is recommended because the water already present in the fresh plant will dilute the alcohol significantly during extraction. You need to start high so the final concentration stays above 20% for preservation.
Herb-to-Solvent Ratios
The ratio of plant material to solvent, measured by weight to volume, controls how concentrated your extract will be. Two standard starting points cover most situations:
For dried herbs, a 1:5 ratio is standard. That means 1 gram of dried herb to 5 milliliters of solvent. So for a practical batch, you’d use 100 grams of dried herb with 500 milliliters of alcohol at 50 to 65% strength.
For fresh herbs, a 1:2 ratio is typical. One gram of fresh plant material to 2 milliliters of high-proof alcohol (95%). The tighter ratio compensates for the water content in the plant, which dilutes the solvent as it extracts.
These ratios aren’t rigid. Very light, fluffy herbs like calendula flowers may need a 1:4 or 1:5 ratio even when fresh, simply because they take up a lot of volume without much weight. Extremely dense materials like milk thistle seeds sometimes call for a 1:1 ratio. Potent herbs are occasionally prepared at 1:10 or even 1:20 to keep the final product less concentrated.
The Maceration Method Step by Step
Maceration is the simplest and most common method for home extraction. You’re essentially soaking the herb in your solvent and letting time do the work.
With Dried Herbs
Grind or chop your dried herbs into small pieces, roughly 2 to 4 millimeters. Smaller particles expose more surface area to the solvent, which improves extraction. Place the herbs in a clean glass mason jar. Pour your measured alcohol over them, making sure the liquid covers the plant material completely. Give the jar a good shake, seal it tightly, and label it with the date, herb name, ratio, and alcohol percentage.
Store the jar in a cool, dark place for 2 to 4 weeks. Shake it daily for at least the first week, then every few days after that. The shaking keeps fresh solvent in contact with the plant material and prevents settling.
When the maceration period is over, strain the liquid through a fine mesh strainer or cheesecloth into a clean glass bottle. Squeeze or press the plant material to get every last drop of extract out. Label the bottle and store it away from heat and light.
With Fresh Herbs
Chop the fresh herbs as finely as you can. Place about 100 grams of chopped herb into your jar and cover with 250 milliliters of high-proof alcohol. Remember that the water content in fresh plants will dilute the alcohol by roughly half, so starting with strong alcohol (around 95%) is important to keep the final concentration above the 20% threshold needed for preservation. Follow the same maceration timeline: 2 to 4 weeks in a cool, dark spot, shaking daily for the first week, then strain and bottle.
Making a Glycerite (Alcohol-Free)
If you want to avoid alcohol entirely, a glycerite is your best option. Fill a clean glass jar one-quarter full with dried herbs. Pour food-grade vegetable glycerin over the herbs until the jar is full to within about an inch of the top. Stir well to release any air bubbles trapped in the plant material, and add more glycerin if needed to keep everything submerged.
Seal the jar, label it, and place it in a dark cabinet for one month. Give it a shake every few days. After a month, strain through cheesecloth into a clean bottle. Glycerites won’t be as potent as alcohol extracts for most herbs, but they work well for gentler preparations and taste much more pleasant.
What Your Solvent Actually Pulls Out
Understanding why different solvents work differently can help you choose the right one for a specific herb. Plant compounds range from water-loving (polar) to oil-loving (nonpolar), and your solvent needs to match.
Water excels at extracting polysaccharides, tannins, and certain glycosides. Alcohol handles a broader range: polyphenols, flavonoids, alkaloids, and terpenoids all dissolve well in ethanol. This is why alcohol tinctures are considered the gold standard for most medicinal herbs. A mixture of alcohol and water, which is what most vodka or diluted grain alcohol provides, gives you the best of both worlds, pulling out both water-soluble and alcohol-soluble compounds in one extraction.
Tannins, the astringent compounds found in many medicinal barks and leaves, dissolve in both water and ethanol. Alkaloids, the nitrogen-containing compounds responsible for the medicinal activity of herbs like goldenseal and barberry, are best extracted with ethanol. Resinous compounds found in herbs like myrrh or propolis require high-proof alcohol because they’re essentially insoluble in water.
Storage and Shelf Life
How you store your extract directly affects how long it stays potent. The World Health Organization’s guidelines for herbal preparations emphasize protection from moisture, light, heat, and pest contamination.
Use dark amber or cobalt blue glass bottles. Clear glass lets light degrade the active compounds over time. Store bottles in a cool, dry place at a stable temperature. A kitchen cabinet away from the stove works well. Avoid bathrooms and areas with high humidity.
Alcohol-based tinctures with adequate alcohol content (above 20%) remain stable for several years when stored properly. Some herbalists report using tinctures five or more years old with no noticeable loss of potency. Glycerites have a shorter window of about 14 to 24 months, and you should refrigerate them after opening. Water-based extracts (teas, decoctions) should be used within a day or two, or refrigerated and used within a week at most.
Aromatic extracts, those made from fragrant herbs rich in volatile oils, are especially sensitive to heat and light. Make these in smaller batches and store them in airtight, light-resistant containers.
Common Mistakes to Avoid
Using too little solvent is one of the most frequent errors. If the plant material isn’t fully submerged, the exposed portion can develop mold, ruining the entire batch. Always make sure the liquid level sits at least an inch above the herbs, and check periodically during the first few days since dried herbs absorb liquid and swell.
Skipping the daily shaking during the first week noticeably reduces extraction quality. The agitation keeps the concentration gradient working in your favor, pulling more compounds into solution.
Using too weak an alcohol for fresh herbs is another common pitfall. Fresh plant material can be 60 to 80% water. If you start with 40% vodka and add water-heavy fresh herbs, your final alcohol concentration can drop below 20%, which means the extract won’t preserve itself and could spoil.
Finally, not labeling your jars is a mistake you’ll only make once. After a few weeks of maceration, many tinctures look nearly identical. Write down the herb, the solvent type and percentage, the ratio, and the start date every single time.