Covering Grey Before Diwali: When to Start and How to Plan

by Wooly Team

If you want to cover grey hair for Diwali, the most common mistake is leaving it too late. Colour plans fail on timing, not technique. With Lakshmi Puja falling on Sunday 8 November 2026 and Dhanteras on Friday 6 November, you have about three weeks from now — which is enough, but only if you start this weekend.

Here is a concrete plan that works backwards from the festival dates.

The patch test sets your real deadline

Wooly Hair Colour Shampoo contains colourant actives including PPD and Resorcinol. Anyone using it for the first time must do a patch test 48 hours before the first wash. That is not a formality you can skip. If you have never used it before, you cannot start the night before an event. The patch test is what determines when everything else can happen.

If you want detailed instructions, the patch test guide walks you through it. Do not use the shampoo if you have sensitive or allergy-prone skin or a known hair-dye allergy.

A countdown that fits the calendar

  • This weekend (around 18–19 October): Do your patch test. Wait the full 48 hours. Any redness, itching or irritation means stop and seek medical advice.
  • Around 21 October: If there is no reaction, do your first trial wash. This lets you see the actual shade on your own hair before the festival. Note that very white or resistant grey may need a second wash on first use — this is normal, and the trial wash is the right moment to find that out, not Diwali evening.
  • Around 4–5 November: Do your final wash, a couple of days before Dhanteras. This carries you through both Dhanteras and Lakshmi Puja with fresh coverage.

The gap between the trial wash and the final wash is about two weeks, which sits comfortably within the recommended interval of once every 2–3 weeks. Do not compress this timeline by washing more frequently than that.

Why this timing works

Colour from Wooly Hair Colour Shampoo lasts 2–3 weeks before it gradually fades. A wash on 4–5 November means the colour is fresh for the festival days. The trial wash in October means there are no surprises about shade or coverage when it actually matters.

A few practicalities for the day

  • Wear thin gloves during application to keep staining off your hands.
  • Leave it on for five minutes, then rinse promptly.
  • Do not apply on irritated or broken skin.
  • Do not colour for the first time right before an event if you have not yet patch tested.

The bottom line

Three weeks is a workable window, but only if the patch test happens this weekend. Start there, do a trial wash early, then a final wash around 4–5 November — and you will go into Dhanteras and Lakshmi Puja with coverage you have already seen on your own hair, with no last-minute uncertainty.

Wooly Hair Colour Shampoo covers grey in one wash, takes five minutes, and is ammonia-free — see the full details →