Mountain ginger (plai): an essential oil from Thailand that shares only a name with ginger

In brief: Mountain ginger (plai, Zingiber cassumunar) is a different plant from kitchen ginger. Its oil smells fresh, spicy and lightly camphoraceous, and in Thai tradition it belongs in massage oils. For adults dilute it to 2–3%; for an oil burner 2–3 drops are enough. Do not give it to children under 6.

In the markets of Bangkok, plai is sold as a fresh rhizome, dried, and as the basis of herbal massage packs. It is less well known here and is often confused with ginger, because it is called "mountain ginger" in Czech. In reality it is a separate species with an entirely different scent and oil composition.

If you are looking for classic warming ginger for winter blends, you will find it in the article ginger essential oil in aromatherapy. Here we deal with plai: how it differs, what it suits and how to dilute it.

Plai vs. ginger: relatives, but not twins

Both plants belong to the same genus, but the oils overlap only minimally. A comparative laboratory study from 2023 showed that the main components of ginger oil (zingiberene, beta-sesquiphellandrene, curcumene) are present in plai at below 1%. And conversely: terpinen-4-ol and sabinene, which form the backbone of plai, are found in ginger only in traces.

Terpinen-4-ol is, incidentally, the same substance that predominates in tea tree. That is why plai smells cleaner and "greener" than ginger. Plai also has the typical substance DMPBD (dimethoxyphenylbutadiene), which does not occur in other common oils.

Thai massage at home: how to dilute plai

In Thailand, plai is traditionally used in massage oils and in herbal "compresses" that are warmed and applied to the body. At home a simpler version is enough: a massage oil after a day in the garden, after sport or after long sitting at a computer.

1. Into a bottle with 30 ml of carrier oil, for example jojoba, drip 12 drops of plai (2%).
2. Add 4 drops of lavender or marjoram, which will round off the scent.
3. Close the bottle, shake it and leave it to rest for an hour.
4. Massage into the shoulders, back or calves. Do not use this blend on the face.

For adults, a dilution of up to 3% is reasonable for a larger area of the body, that is, at most 6 drops per 10 ml or 18 drops per 30 ml of carrier oil. For plai, Tisserand & Young give no special restrictions, but the rule "dilute and do not overdo it" always applies. More tips on massage blends can be found in the article relaxing massages with essential oils.

Plai in an oil burner

In an oil burner plai comes across as fresh and a little "medicinal", which is why it suits a study or bathroom better than a bedroom. On its own it may seem sharp; with citrus and herbs it is more pleasant.

• Morning wake-up: 2 drops of plai, 2 drops of lime, 1 drop of lemongrass.
• Study: 1 drop of plai, 2 drops of grapefruit, 1 drop of rosemary.
• Spicy trio: 1 drop of plai, 1 drop of ginger, 1 drop of turmeric and 2 drops of orange.

The numbers of drops are for a dish of an oil burner or 100 ml of water in a diffuser. A table for rooms of different sizes can be found in the article how many drops of essential oil for a diffuser. Use the blend with rosemary only where there are no children under 6.

What research says about plai

Plai oil is researched fairly often, but almost exclusively in the laboratory. The studies deal with its antimicrobial activity in a test tube and, in experiments on animal models, with suppression of inflammation. No documented therapeutic effect in people follows from this so far. We therefore recommend plai as an aromatic component of massage and aromatherapy blends, not as a replacement for an ointment from the pharmacy.

Safety: short, but important

• Skin: always dilute. Oils with terpinen-4-ol irritate more after oxidation, so use up the bottle within 1–2 years of opening and store it closed in the cool.
• Children: like tea tree, only from 6 years; in an oil burner at most 1 drop in a blend, on the skin up to 1%. More in the article essential oils and children.
• Pregnancy and breastfeeding: there is little data; we recommend leaving it out.
• Cats: oils with terpinen-4-ol (tea tree) are risky for cats. So do not run plai in a room with a cat, and do not massage the animal. More in the article essential oils and pets.
• Eyes and mucous membranes: wash your hands after working with the oil; do not apply it to mucous membranes, even diluted.

Frequently asked questions

Is mountain ginger the same as plai?

Yes. "Mountain ginger" is the Czech trade name for Zingiber cassumunar; in Thailand and in English-language literature it is called plai. Do not confuse it with common ginger or with Zingiber zerumbet (shampoo ginger).

Can I use plai instead of ginger oil?

In a massage blend yes, but the scent will be different, fresher and less sweet. For Christmas and winter blends, where you want classic "gingerbread" ginger, reach for common ginger.

How many drops of plai in a massage oil?

For adults 4–6 drops per 10 ml of carrier oil, that is, 2–3%. For a smaller area, such as the shoulders, a weaker blend is enough.

Is plai suitable for children?

Not under 6. For older children only as 1 drop in a blend in an oil burner, or on the skin at a weak dilution up to 1%, never near the face.

How long does plai last?

Closed, in the cool and dark, roughly 2 years; after opening count on 1–2 years. If it begins to smell musty or sharply "turpentine-like", do not use it on the skin any more.

Recommended products

• BIO Mountain ginger (plai), essential oil 10 ml – oil from the rhizomes of Zingiber cassumunar from Thailand for massage and fresh herbal blends.
• BIO Ginger, essential oil 10 ml – when you want a warmer and sweeter spicy scent.
• BIO Lavender, essential oil 10 ml – softens plai in a massage blend.
• BIO Lime, essential oil 10 ml – a fresh partner for the oil burner.
• BIO Jojoba, carrier oil 10 ml – a carrier for massage oil.
• Ceramic oil burner, white, 12.5 × 10.5 cm – a larger dish for blends in the study.

Sources

• Tisserand R., Young R.: Essential Oil Safety, 2nd edition, Churchill Livingstone 2014 (Plai profile, p. 400).
• AromaWeb: Plai Essential Oil (composition and safety) – aromaweb.com
• Essential Oil of Zingiber cassumunar Roxb. and Zingiber officinale Rosc.: A Comparative Study on Chemical Constituents…, Chem Biodivers 2023 – PubMed 37202876
• Anti-inflammatory activity of niosomes entrapped with Plai oil (Zingiber cassumunar Roxb.) by therapeutic ultrasound in a rat model, Int J Nanomedicine 2017 – PubMed 28408818

Updated: 27 September 2026