Horsetail (Equisetum arvense) is one of the oldest plants in herbal hair care, prized for one thing above all: it is nature's richest common source of silica, the mineral associated with hair strength, elasticity and shine. Making horsetail oil at home is a one-jar job, and used weekly it makes a genuinely pleasant strengthening treatment. Here is the honest expectation-setting, the single clean method, and how to use and store the result.

What horsetail actually offers hair

Horsetail's stems are loaded with silica, part of the body's collagen-forming toolkit and traditionally associated with stronger, more elastic, shinier hair, plus flavonoids and phenolic antioxidants that buffer everyday oxidative stress. The honest status: traditional use and plausible chemistry, without modern clinical trials behind the growth claims. Treat horsetail oil as a strengthening and conditioning treatment with heritage, not a growth drug, if genuine thinning is your concern, start with our complete hair growth guide. (It is also why horsetail appears alongside silica in our GrowPro gummies, covering the inside route.)

The method

You need

• Dried horsetail herb (herbal shops or online; organically sourced; always dried, moisture invites mould)
• A carrier oil: jojoba for fine or oily hair, olive for normal, coconut for dry or coily
• A clean, bone-dry glass jar, cheesecloth or fine strainer, and a dark glass bottle for storage

Make it

1. Crumble about 1 cup of dried horsetail into the jar and cover completely with roughly 2 cups of oil, herb fully submerged, no air pockets.
2. Slow infusion: lid on, warm sunny spot, 2 to 6 weeks, shaking every couple of days. Fast infusion: jar in a warm water bath (never simmering) for 2 to 3 hours.
3. Strain through cheesecloth, pressing the herb to extract everything.
4. Bottle in dark glass, label with the date, store cool and dark. Use within 6 to 12 months, discard at any rancid smell or cloudiness.

How to use it

• Scalp massage (the core use): a small amount massaged in for 4 to 5 minutes, left 30 to 60 minutes (or overnight occasionally, capped), then shampooed out. 2 to 3 times a week.
• Pre-wash strengthener: through mid-lengths and ends 30 minutes before washing.
• Blend it: horsetail pairs well with rosemary (the evidence-carrying herb, per our rosemary guide) for a strength-plus-growth-support mix, the general blending rules are in our herb infusion guide.

Safety notes

• Patch test on the inner arm, 24 hours, before first use.
• Dried herb and dry equipment only, water in oil is how infusions spoil dangerously.
• Pregnant or breastfeeding: check with your GP before regular herbal use, horsetail specifically is one to run past them.
• Wash out thoroughly; oil residue builds up on fine hair especially.

GrowPro Gummies, Horsetail from the Inside

Prefer the zero-effort route? GrowPro pairs horsetail and silica with biotin, zinc and saw palmetto in one daily gummy, the same herb, no jars required. Vegan and cruelty-free.

Shop GrowPro

Watermans is a UK family business that has sold over 5 million bottles since 2012. The range is vegan and cruelty-free.

Frequently asked questions

Does horsetail oil really grow hair?

Its silica and antioxidants support strength and shine, with centuries of traditional use, but no modern trials prove growth claims. Use it for what it demonstrably does.

How often should I use horsetail oil?

Two to three times a week as a massage or pre-wash treatment. More adds build-up, not benefit.

Can I use horsetail oil on all hair types?

Yes, matched by carrier: jojoba for fine or oily, olive for normal, coconut for dry and coily hair. Patch test first.

Can I mix horsetail with other oils?

Yes, rosemary is the classic partner, adding the one botanical with genuine trial evidence to horsetail's strengthening profile.

How long does homemade horsetail oil keep?

Six to twelve months in dark glass, stored cool and dark. Rancid smell or cloudiness means bin it.

A cup of dried horsetail, a decent oil and a patient windowsill: the silica herb becomes a weekly strengthening ritual your hair will notice in its shine first. Brew it honestly, use it consistently, and let it play its proper part in the bigger routine.