Flax

Flax can be used on a spinning wheel by a member with 10 Crafting to create bow string, granting 15 Crafting experience. It is picked from plants that grow on the ground and can be found in various places around the members' world. Flax plants can be found in the Tree Gnome Stronghold, near Seers' Village, just south of the bank in Lletya (closest to a bank), and on Lunar Isle.

The best place to spin flax into bowstrings is at the Lumbridge Castle. You bank at the top floor (level 3), then use the spinning wheel on the floor below (level 2), and then repeat.