Best botanical beard dye shampoos for grey coverage

Top pick: Mokeru Beard Dye Shampoo — the closest thing to a true botanical beard dye shampoo here: a plant-forward formula in a 200 ml bottle that colours beard and moustache in one wash-in step, and it's the most widely sold of the bunch. Best if you want a gentle, low-commitment touch-up you can repeat as greys return.

Who the others suit:

• Black Beard Color Shampoo (ammonia-free) — the safest bet if your skin reacts easily; strong ratings and a big bottle for regular use.
• Mens Black Beard Dye Shampoo 3 in 1 — if you want shampoo, colour and conditioning in one product and don't mind a less "natural" formula.
• Black Hair & Beard Dye All-in-One Kit — if you'd rather do a proper application every few weeks than wash-in colour; it states up to five weeks of grey coverage.
• Gowwim / SEVICH — budget-friendly, sensitive-skin options for a quick first try.

Note: most of these list "natural pigment" rather than certified botanical ingredients, so patch-test first.