Natural Indigo is so richly historic and steeped in values from many cultures I don't know where to start! A silk road colour, which has found its way to and now grows in various locations around the world.
Bailiwick Blue is derived from the white flowering "Kojyoko" Japanese native.
200 gm of powdered indigo will dye 1kg of fabric or yarn a mid to dark indigo.
100g will dye 500g a mid to dark blue, all depends on weight of fabric.