Thyme water is a simple herbal rinse made by steeping thyme in boiling water, then applying it to your scalp after shampooing. It takes about 10 minutes to prepare, stores easily in the fridge, and has some real evidence behind it as a hair growth aid. Here’s exactly how to make it and get the most out of it.
The Basic Thyme Water Recipe
You need two ingredients: thyme and water. Use four heaping tablespoons of dried thyme or about half a cup of fresh thyme leaves for every two cups of water. Bring the water to a boil, add the thyme, then remove the pot from heat and let it steep for 15 to 20 minutes with a lid on. Strain out all the plant material through a fine mesh strainer or cheesecloth, and let the liquid cool completely before using it.
The result is a golden-brown, fragrant liquid. If it looks pale and barely has any scent, you probably used too little thyme or didn’t steep it long enough. You want the water to have a noticeable herbal smell and color, which tells you the beneficial compounds have actually transferred into the liquid.
Which Thyme to Use
Common thyme (the kind you find in any grocery store spice aisle) works well. Wild thyme is also used in the cosmetic industry specifically for scalp health, where it acts as an antiseptic and stimulates local blood flow. Both varieties contain the same key compounds, particularly carvacrol and thymol, which give thyme its antimicrobial and circulation-boosting properties. If you’re growing thyme in a sunny spot, the plants tend to develop higher concentrations of these active compounds. But regular dried thyme from the store is perfectly fine for a hair rinse.
How to Apply It
Use thyme water as a final rinse after you’ve shampooed and conditioned your hair. Lean over a sink or basin, slowly pour the cooled thyme water over your scalp, and massage it in with your fingertips for one to two minutes. Focus on areas where your hair is thinning or where your scalp feels irritated. Don’t rinse it out. Let your hair air dry or style as usual. The smell fades as your hair dries.
For best results, use the rinse two to three times per week. Consistency matters more than quantity. A single application won’t do much, but regular use over several weeks gives the thyme compounds time to work on your scalp environment.
Optional Variations
Plain thyme water is the simplest approach, but you can boost it in a few ways:
- Thyme and honey mask: Mix your thyme water with a tablespoon of raw honey, apply the mixture directly to your scalp and hair, leave it on for 20 minutes, then rinse thoroughly. The honey adds moisture and has its own antimicrobial properties.
- Thyme and olive oil treatment: Combine a few tablespoons of thyme water with olive oil, apply it to your hair with extra attention to the ends, and leave it on for 30 minutes before washing out. This works well if your hair is dry or brittle alongside thinning.
- Apple cider vinegar thyme rinse: Steep your thyme directly in diluted apple cider vinegar instead of plain water. The vinegar helps balance scalp pH and acts as a natural preservative, giving the rinse a much longer shelf life.
Does Thyme Actually Help Hair Grow?
The most cited evidence comes from a randomized clinical trial published in Archives of Dermatology. Researchers tested a blend of essential oils including thyme on people with alopecia areata, a condition where the immune system attacks hair follicles. After seven months, 44% of patients using the essential oil blend showed measurable improvement in hair regrowth, compared to just 15% in the control group. That difference was statistically significant.
It’s worth noting that the study used concentrated essential oils (not a water infusion) and combined thyme with other oils, so you can’t attribute the results to thyme alone. A water-based rinse delivers lower concentrations of active compounds than essential oil does. Still, thyme’s ability to improve scalp circulation and fight bacterial or fungal overgrowth is well documented, and both of those factors create a healthier environment for hair to grow.
How Thyme Compares to Rosemary
Rosemary water has gotten enormous attention as a hair growth treatment, and for good reason. Between the two herbs, rosemary has stronger direct evidence for stimulating hair follicles and is generally considered the more potent option for hair growth specifically. If you’re choosing just one herb, rosemary is the stronger bet. But thyme brings unique antimicrobial strength that rosemary doesn’t match, making it particularly useful if your thinning hair comes alongside dandruff, scalp irritation, or itchiness. Many people combine both herbs in a single rinse, steeping them together in the same pot, which covers more bases.
How to Store Thyme Water
Plain thyme water (made with just water and thyme) is perishable. Store it in a clean glass jar or spray bottle in the refrigerator and use it within five to seven days. If it starts to smell off or looks cloudy, discard it and make a fresh batch. Making small batches frequently is better than making a large amount that sits too long.
If you want a longer shelf life, the apple cider vinegar version is your best option. Vinegar is a natural preservative, and as long as you strain out all plant material thoroughly, an ACV-based thyme rinse can last months at room temperature. The key is removing every bit of herb from the liquid, since leftover plant matter is what promotes mold and bacterial growth.
Patch Test Before Full Use
Thyme can cause allergic contact dermatitis in some people. Documented cases exist of skin reactions to both thyme and rosemary applied topically. Before pouring thyme water all over your scalp, dab a small amount on the inside of your wrist or behind your ear. Wait 24 hours. If you see redness, itching, or a rash, thyme rinses aren’t for you. People with known sensitivities to plants in the mint family (which includes thyme, rosemary, oregano, and basil) should be especially cautious.