Indigo Powder for Hair: A Beginner's Guide to Natural Hair Colour
Published 18 October 2025
What is indigo powder and why people choose it
Indigo (Indigofera tinctoria) is one of the oldest natural dyes in the world, long used in Indian and Middle Eastern traditions for soft, plant-based hair colouring.
On its own, indigo gives blue-black tones. Paired with henna, it produces warm browns to rich blacks depending on the ratio — a beautiful alternative for anyone moving away from chemical colourants without giving up colour.
How indigo works: the two-step method
The most important thing to know: indigo works best as a two-step process. First, colour your hair with henna and rinse it out. Then mix Growterra Indigo Powder with warm water into a thick paste (no lemon, no acid) and apply immediately — indigo does not benefit from long resting times.
Choosing your shade
Soft browns
Leave the indigo paste on for 45–60 minutes after a henna step. The final colour deepens over 24–48 hours.
Rich blacks and grey coverage
Use a fuller henna cycle first, then apply indigo for 60–90 minutes. Repeat every 4–6 weeks for consistent grey coverage.
Aftercare so the colour lasts
Rinse thoroughly with water only. Avoid shampoo for the first 24–48 hours so the colour can settle and deepen. After that, cleanse with a gentle, sulphate-free wash like shikakai powder.
Your final shade depends on your starting hair colour, your hair's porosity and the freshness of the powder. A small strand test first is always worth the extra five minutes.
What to expect over time
Indigo, like all plant-based dyes, gets richer over a few applications. The reward is colour that feels lived-in and natural — gentle, conditioning and beautifully traditional.
How to use indigo powder for natural hair colour
A two-step henna + indigo method for rich brown to jet-black natural hair colour.
- 1
Step 1 — Apply henna first
Mix henna with warm water (and a little lemon if your scalp tolerates it). Apply to clean hair, leave 2–3 hours, and rinse with water only — no shampoo.
- 2
Step 2 — Mix indigo paste
In a non-metallic bowl, mix Growterra Indigo Powder with warm water to a thick, yogurt-like paste. Do not add lemon or any acid. Use the paste within 10–15 minutes.
- 3
Step 3 — Apply indigo
Section your hair and apply the paste root-to-tip with a brush or gloved hands. Cover with a shower cap.
- 4
Step 4 — Time it for your shade
Leave on 45–60 minutes for soft brown tones, or 60–90 minutes for deep brown to jet-black.
- 5
Step 5 — Rinse and rest
Rinse thoroughly with water only. Avoid shampoo for 24–48 hours so the colour can oxidise and deepen.
- 6
Step 6 — Maintain
Cleanse with Shikakai powder or a sulphate-free wash, and refresh every 4–6 weeks for consistent coverage.
Pure Indigo Powder — Natural Hair Dye
Plant-based black & brown tones · 100g
Shop now →Shop the storyShikakai Powder — Ayurvedic Hair Cleanser
Gentle, sulphate-free hair wash · 100g
Shop now →Frequently asked questions
How do I use indigo powder for hair?+
Apply henna first and rinse. Then mix indigo with warm water into a thick paste, apply immediately, leave 45–90 minutes depending on the shade you want, and rinse with water only.
Will indigo cover grey hair to jet black?+
Yes — used after henna (the two-step method), indigo gives long-lasting jet black. Used alone, indigo leans navy-brown rather than true black.
How long does natural indigo hair colour last?+
A henna + indigo cycle typically lasts 4–6 weeks before roots show. The colour deepens over the first 48 hours, so the final shade is always richer than the day-of result.
Can I use indigo without henna?+
Yes, but expect cooler, blue-toned brown rather than a warm brown or true black. For grey coverage, the two-step henna + indigo method works best.
Is indigo powder safe and chemical-free?+
Growterra Indigo is 100% Indigofera tinctoria leaf — no PPD, no ammonia, no metallic salts and no synthetic dyes.
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