Tell me all you know about birdsfoot trefoil as a dye
I am interested in learning to dye my homespun wool with natural dyes. One of my flower beds has been overtaken by birdsfoot trefoil. I can find off hand remarks online about dying with it, but no instructions or cautions (irritant, toxic). Is it safe to dye with? What kind of colors does it produce? Is it lightfast? What am I not considering?
Thanks.