Do you have blue spruce in your neighborhood? If so, grab yourself a few boughs and chop them up in your dye pot! By adding iron water to your brew, you can coax out the bluish tint from this evergreen to create gorgeous cool grays. This tutorial will show you how to identify & brew dye from a blue spruce, shift color with iron water and the resulting color swatch samples (cotton, bamboo & silk) with various mordants.