You can pick flax in Zeah lands end - there is no requirements and bank is super near.
After this you can easily spin flax to bowstring in Lumbridge or neitiznot.
If you dont want to pick flax but need flax, level up slayer and kill kurasks or Zulrah. Also if you need only bowstrings you can earn them in trekking minigame. ( morytania)
But this place is best for new players and ironman in osrs runescape 2007.
Osrs flax locations guide.
Flax is not worth for moneymaking, because price now is around 3-4gp ea .
