From YPPedia

Yarrow
Raw goods
Mass: 0.2 kg	Volume: 1 L
Obtained from: Commodities markets, Merchant brigands
Used by: Apothecaries, Tailors
End products: Furniture, Enamel, Laurels

Yarrow is one of fifteen herbs. It is an ingredient in white enamel and laurels. This herb is extremely scarce on all oceans and usually commands a high price.

Spawn Locations

Cobalt	Hunter	Ice	Malachite	Midnight	Sage	Viridian
Viridis Island	Nunataq Island*	Winking Wall Island*	Ivorite Island* Sconce Isle* Viper's Drop*	Beta Island Flow*	Cryo Island	Viridis Island

*Islands without market bidding.

Use

Yarrow is needed in the production of:

Apothecary products

Skintone elixir (3)

Universal hair dye (2)

White enamel (6)

Furnisher products

Crate o'herbs (10)

Crate o'spices (10)

Tailor products

Laurel (1)