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Blonde Henna (Rhubarb) - Natural Hair Color For Light & Blond Hair Cosmos Natural

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Do you have naturally light hair and you’re starting to notice the first gray hair? Do you want to give mild golden highlights to your blonde hair?


is a highlighting, shine-enhancing and strengthening herbal hair color that gives golden highlights to light hair. It is a natural hair color for blonde and light hair, it is very gentle and it respects the capillary fiber. It is the ideal alternative to chemical dyes and it can be used:

  • to dye your grey regrowth
  • to revitalize your light hair by giving it unique golden highlights
  • to obtain various shades of blonde on naturally light hair, when mixed with other herbal hair colors.

Highlighting. Strengthening. Shine-enhancing.

For glorious hair with sensual and glossy highlights!



is the perfect natural highlighting herbal hair color to give warm, golden highlights to your naturally light hair. It is the safe and healthy alternative to gently dye your hair (even if it is grey).

Rhubarb is indicated to obtain various shades of blonde hair color on light hair (blonde and/or light brown). Rhubarb can be mixed with other herbal hair colors, in fact we recommend using it blended with other herbal powders to obtain your unique shade according to on your own needs.

Rhubarb is a highlighting herb able to dye your gray hair

by dyeing it of a golden shade of blonde. The obtained shade can be toned down or intensified by adding cassia, sidr, amla or lawsonia in your mix. You can obtain a more or less vivid shade based on the percentage of herbal hair colors you add to it. You can even obtain a venetian blond!

What makes us different? Our quality!

Our Rhubarb is 100% pure, and of the finest quality, to ensure you the best highlighting effect on your hair!

Unlike chemical dyes that damage irreparably the hair structure because they penetrate in the shaft and they make it dull and dry, the highlighting pigment that can be found in rhubarb, if mixed to other herbs' dyeing pigments, allows you to create your own hair color, with unique and glamorous highlights.

It’s a highlighting herb 100% pure that helps you give your hair beautiful, unique and natural golden shades. It also leaves your hair strengthened, full of volume and shiny, and it purifies your scalp. Easy and fast application for a unique color, for a professional result!

Like all the other herbal hair colors, Rhubarb helps your scalp, too, while it dyes your light hair.

Rhubarb has antifungal and antibacterial properties that:

  • sanitize and purify your scalp
  • restore your scalp’s pH
  • promote hair growth.

Rhubarb is more than just a natural dye for blond and light hair!

More than just a natural hair dye: it is a true beauty treatment not only for thin and fine hair, but also for oily hair. A constant use helps opposing the shaft’s impoverishment and hair’s weakening.

Strengthens, repairs and dyes your hair!


  • has a strong sebo-equalizing and anti-dandruff effect
  • makes your hair voluminous, strong and shiny.

Use rhubarb powder to have beautiful and glowing hair with unique highlights!



Available in 100g (3.50 OZ) bags.

Ingredients: Rheum Rhapontica Root powder

100% chemical additives-free! 

Rhubarb - high-quality highlighting herb for blond and light hair, 100% pure, derives from Rheum Rhaponica’s powdered rhizome.

Thanks to its anthraquinones pigments, it can give to light hair warm, blond highlights that can vary based on the base color.

Harvested and grinded seasonally, rhubarb has the consistency of talcum powder.

Since rhubarb gives your hair a warm, intense yellow shade, we suggest you should not to use it pure, but to mix it with other herbal hair colors and/or ayurvedic powdered herbs to customize your own hair color in order for it to satisfy your needs.


    Nota bene!

    Rhubarb must be used only AFTER having tried it on a hidden strand of hair. Because of its high dyeing properties, it can radically change your light and/or blond hair color!

      How to use

      For external use only.

      Easy and fast application for a unique color, for a professional result!

      • Do a color test on a hidden strand of hair before dyeing it all to avoid unpleasant results.
      • Do an allergy test on the upper part of your inner arm (at the crook of the elbow) 48 hours before applying it. Subjects predisposed to develop allergies can have an allergic reaction, even if the product is 100% natural.

      How much Rhubarb should you use?

      - Short hair: 50 grams, circa

      - Long hair: from 150 to 200 grams

      - Gray regrowth: arounc 50-60 grams


      ✓ Weigh your dyeing mix based on your hair length and volume.

      ✓ Use Rhubarb (pure or mixed) only if you did a color test on a hidden strand of hair.

      ✓ Add warm tap water to the powder and mix until you obtain a dense batter, yoghurt-like.

      ✓ Apply your mix on clean hair right away. Use gloves.

      ✓ Wrap your hair with plastic and use a wool hat.

      ✓ Sit time: the less you let the mix sit, the less intense your highlights will be. The more you leave it on, the more intense your hair color will be. You should choose how long to leave the mix on based on your desired hair color and based on the herbal hair colors mix you’re using. The waiting time can vary from 30 minutes to 2 hours tops.

      ✓Rinse your hair. Use a little of green and diluted shampoo and use a little conditioner on your lengths.

      ✓ Always rinse your hair with a mix of cold water and vinegar, to fix your color, to close your hair flakes and to have shiny and vaporous hair.

      RECOMMENDED READING: How to use Henna: The Ultimate Guide to Herbal Hair Dyes!

      Close the bag tightly after use. Keep out of the reach of children. Store away from air, heat, light, and moisture.

      Nota bene:

      Rhubarb must be used only AFTER having tried it on a hidden strand of hair.

      Use rhubarb powder to have beautiful and glowing hair with unique highlights!



      Rhubarb has a high dyeing capacity

      on blond and light brown hair, so it’s rarely used 100% pure and it is often used mixed with other herbal hair colors.

      Irrespective of your chosen mix, you have to apply it on your hair only AFTER having done a test on a hidden strand of hair.

      Rhubarb dyes your gray hair by making it yellow, and if mixed with other herbal hair colors, it can help obtain various shades of blonde. It can also revitalize streaks and highlights.

      But Rhubarb is a highlighting herb, so, even if it has a strong dyeing property, it is NOT a permanent herbal hair color, like Lawsonia (red henna). So, as opposed to Lawsonia, it doesn’t dye your hair permanently: the color lasts, but it will tone down little by little with every wash. How long it stays on your hair depends on your hair porosity.

      If you want to use it 100% pure on your hair, it can result difficult to apply hence we suggest you to use flaxseeds gel instead of water:

      The video has English subtitles, remember to turn them ON!


      To optimize the coverage and the color duration on gray hair, it can be mixed with a low quantity of Lawsonia that can be decided based on the shade you want to obtain.

      To dilute its high dyeing power, you can always mix it with Cassia or Sidr.

      You can create your own unique herbal hair colors mix to obtain new, glowing hair colors with natural unique highlights with every new application.

        Use rhubarb powder to have beautiful and glowing hair with unique highlights!


        Frequently Asked Questions:

        Who should use Rhubarb?

        Rhubarb is ideal for who wants to highlight a blonde hair color, to revitalize streaks or for who wants to dye their gray hair but also have a light hair color.

        Does Rhubarb dye gray hair?

        Yes, gray hair is dyed of a warm, golden blond.

        Is Rhubarb permanent?

        No, Rhubarb is a highlighting herb, not a dyeing herb, so it’s not permanent on hair. It washes away but it lasts quite a while.

        How can I decide how long I should keep the Rhubarb mix on?

        The waiting time must be decided based on the color shade that you wish to obtain and based on the mix you’re using. The waiting time can vary between 30 minutes to 2 hours. The more you keep it on, the more intense your color will be. If you need to dye your gray hair, you can let it sit even for 3 hours (tops).


        The video has English subtitles, remember to turn them ON!


        Recommended to:

        revitalize blonde, light and golden hair

        dye white and grey hair

        heal weak and damaged hair

        give volume to fine, thin hair



        - Highlighting herb that dyes your gray hair

        - Gives tone on tone highlights



        ✓ Highlighting

        ✓ Shine-enhancing

        ✓ Volumizing

        ✓ Strengthening

        ✓ Antifungal and antibacterial


        Main features:

        - 100% pure

        - High quality

        It does NOT contain ammonia, metallic salts, PPD's or any unlisted ingredients

        - Consistency of talcum powder

        - Easy to apply and rinse off

        --> The video has English subtitles, remember to turn them ON!


        Bring your hair back to life with Nature's help!

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