Wild color : the complete guide to making and using natural dyes by Jenny Dean — This guide not only provides instructions on how to dye your own yarn, it also includes an extensive, detailed list of plants you can use to make your own natural dyes. In addition, there is a handy chart for determining what dyeing method is best for which types of fiber, and each plant listing shows swatches of what colors you can expect to create with it. Many of these plants may already be growing in your garden!