Mehndi for Hair: The Complete Guide to Henna at Home

In many Pakistani homes, Sunday morning means mehndi. A bowl of green paste soaked overnight, an old dupatta around the shoulders, a plastic shower cap, and a few hours of waiting while the smell of henna fills the house. Our mothers and grandmothers used mehndi to cover grey hair, add a red glow and, as they said, “thanda” the scalp. Men use it for grey hair and beards too.

Mehndi is one of the most popular natural ways to colour hair in Pakistan. But it is also behind a lot of dry, rough, tangled hair, because most people do not know how to use it without drying the hair out. This guide covers what mehndi does to your hair, how to choose pure mehndi, a step by step method, popular mixes with amla, coffee, tea and indigo, how to avoid dryness, mehndi for grey hair and beards, and what to know before mixing mehndi with salon colour.

What is mehndi and how does it colour hair?

Mehndi (henna) is a powder made from the dried leaves of the henna plant (Lawsonia inermis). The leaves contain a natural dye called lawsone. When you mix the powder with water and let it rest, the dye is released. Applied to hair, lawsone binds to the keratin, the protein that hair is made of, and leaves a red to orange tone.

Mehndi does not lighten hair and does not remove your natural colour. It adds a layer of colour on top. On black or dark brown hair, it shows as a reddish glow in sunlight. On grey or white hair, it shows bright orange or red. With repeated use, the colour builds up and becomes deeper.

Mehndi also coats the hair, which is why many people feel their hair looks thicker and fuller after using it. Henna is also among the traditional herbs used in desi hair oils.

The good and the not so good

How to choose pure mehndi in Pakistan

Not all mehndi is the same. The cheap, very dark “black mehndi” or instant hair colour mehndi sold in many markets may contain a chemical dye called PPD (para-phenylenediamine). PPD can cause serious allergic reactions on the scalp and skin, sometimes with swelling, blistering and scarring.

Look for:

• Plain, green to khaki powder that smells grassy and earthy, like hay.
• Labels that say 100% henna, Lawsonia inermis, with no other ingredients.
• Avoid “black henna” and products that promise black colour in 10 to 30 minutes. Natural henna never gives black colour on its own.
• Fresh stock: old mehndi gives weaker colour. Buy from a busy pansar or a trusted brand.
• Finely sifted powder, which is easier to wash out.

How to apply mehndi to hair, step by step

The night before: oil your hair

This is the step most people skip, and it is the key to avoiding dryness. Oil your scalp and hair the night before with a nourishing oil and leave it overnight. In the morning, if your hair is very oily, rinse it lightly with water only, or apply mehndi directly to lightly oiled hair. Some people find the colour takes slightly less on oiled hair; most find the softer result is worth it.

Preparing the paste

1. Take 100 grams of mehndi for short hair, 200 to 300 grams for long hair.
2. Mix with lukewarm water (or cooled tea or coffee, see mixes below) into a paste like thick yoghurt.
3. Add a tablespoon of oil and, if you like, a few spoons of dahi to make it softer on the hair.
4. Cover and leave it to rest for 6 to 12 hours, or overnight, so the dye releases. In very hot weather, a few hours may be enough.

Applying it

1. Put Vaseline or oil along your hairline, ears and neck to stop staining.
2. Wear gloves, or your hands will be orange for days.
3. Start with clean or lightly oiled, slightly damp hair, divided into sections.
4. Apply the paste thickly from root to tip, section by section, starting at the parting.
5. Pile your hair up and cover it with a shower cap or cling film to keep the paste moist.
6. Leave it for 1 to 3 hours. Longer gives deeper colour, but more than 3 to 4 hours rarely helps and dries hair more.

Washing it out

1. Rinse with plenty of lukewarm water until the water runs clear. This takes time; be patient.
2. Apply a generous amount of conditioner to help the grains slide out, then rinse again.
3. Many people skip shampoo for 24 to 48 hours afterwards, as the colour keeps developing. If your scalp feels gritty, a mild shampoo is fine.
4. The colour often looks bright orange at first and deepens over the next two days.

The day after: oil again

Oil your hair again the day after mehndi, or the evening of the same day, to restore softness. Follow with your normal wash and condition.

Popular mehndi mixes

Mehndi with amla

Adding 2 to 3 tablespoons of amla powder to every 100 grams of mehndi is a classic desi mix. Many people find it gives a cooler, less orange tone and a softer feel. Read our guide to amla for hair.

Mehndi with tea or coffee

Mixing the paste with strong, cooled black tea or coffee instead of water can give a slightly deeper, browner tone. Results are mild and vary from hair to hair.

Mehndi with dahi and egg

Adding a few spoons of yoghurt or one egg makes the paste smoother and less drying. Rinse with cool water if you use egg.

Mehndi and indigo (neel) for brown and black

Natural henna alone cannot give black. To get brown or black on grey hair, people use a two step method: first mehndi, washed out, then a paste of pure indigo powder (neel or wasma) applied the same day or the next. Mixing mehndi and indigo together in one paste gives brown shades. Indigo paste should be used within 15 to 30 minutes of mixing. Use only pure indigo, and patch test both.

How to stop mehndi from drying your hair

• Oil the night before and the day after every mehndi application.
• Add oil and dahi to the paste.
• Do not leave it on for 5 or 6 hours. 1 to 3 hours is enough.
• Use conditioner to wash it out.
• Do not apply too often. Once every 4 to 6 weeks is plenty for most people. For grey roots, apply only to the roots.
• Deep condition weekly with a dahi and honey mask. See our dry hair guide.

How long does mehndi colour last?

Henna colour is long lasting. It fades slowly over four to six weeks, mostly losing some brightness, but a lot of the tone stays in the hair until it grows out. That is why the ends of people who use mehndi for years are often much darker or redder than the roots. To keep the colour even, apply fresh mehndi mainly to the new growth at the roots, and only refresh the full length every few months. This also keeps the older, more fragile lengths from becoming dry and heavy. Sun, chlorine in pools and very hot water fade henna faster, so cover your hair outdoors in summer and wash with lukewarm water.

Mehndi for grey hair

Mehndi is one of the most common ways Pakistanis cover grey hair. On grey or white hair it gives a bright orange or copper colour at first. Repeated applications deepen it to a richer red. For brown or black, use the mehndi and indigo method above.

Mehndi does not stop hair from going grey or turn grey hair back to its natural colour. Grey hair is mostly about genes and age. If you are greying very early, in your teens or early twenties, it can sometimes be linked to low vitamin B12, thyroid problems or other health issues, which a doctor can check.

Mehndi for beards

Many men in Pakistan use mehndi to colour a grey beard. The method is similar, but with a few extra cautions because the skin on the face is more sensitive:

• Patch test on the jawline first.
• Use only pure henna. Never use “black mehndi” with PPD on the face.
• Protect the skin around the beard with Vaseline.
• Leave it for 1 to 2 hours, then rinse and condition the beard.
• Rub a few drops of oil into the beard afterwards to keep it soft.

Mehndi and salon colour, keratin or rebonding

This is important. Pure henna is generally compatible with chemical treatments, but many mehndi products contain metallic salts or other additives that can react badly with bleach, hair dye, perms and rebonding, leading to strange colours, a burning feeling, or broken hair. Even pure henna makes it very hard to lighten hair later, because it stays in the hair for months.

• Always tell your stylist if you have used mehndi in the last year.
• Ask for a strand test before any colour or chemical treatment.
• Do not use mehndi in the two weeks before a salon treatment, or straight after one.
• If you plan to switch to salon colour, it is easier to stop mehndi and let it grow out.

Mehndi in hair oil

Another traditional way to enjoy henna is in hair oil. Henna leaves are one of the herbs used in many desi oils, alongside amla, bhringraj and hibiscus. In an oil, henna does not colour your hair the way a paste does; it is used as a traditional hair care herb. This gives you an easy, everyday way to include it in your routine without the dryness of a full mehndi application.

Zeenat Herbal Hair Oil includes henna among its 20+ herbs, together with amla, bhringraj, hibiscus, shikakai, brahmi and reetha, in 10+ oils such as sesame, coconut, olive, almond, castor, jojoba and kalonji. Use it the night before and the day after your mehndi to keep hair soft. With regular use, it nourishes the scalp, softens dry hair and helps reduce hair fall and breakage.

Mehndi mistakes to avoid

• Using black or instant mehndi without knowing what is in it.
• Skipping the patch test.
• Applying it every week, which leaves hair dry and heavy.
• Leaving it on for many hours thinking it works better.
• Not oiling before and after.
• Getting salon colour or rebonding soon after mehndi without telling your stylist.
• Letting it dry and crack on the hair; keep it covered and moist.

Mehndi for hair in short

• Mehndi (henna) is a natural plant dye that gives a red to orange tone and coats the hair so it looks thicker.
• Buy pure, green, grassy smelling henna; avoid black or instant mehndi that may contain PPD. Patch test every time you try a new product.
• Oil the night before, rest the paste overnight, apply for 1 to 3 hours, rinse with conditioner, and oil again the next day.
• Mix with amla, tea, coffee or dahi for softer results; use indigo for brown or black on grey hair.
• Use it every 4 to 6 weeks at most, and tell your stylist before any salon colour or rebonding.