Today Jacob and I removed our T-shirts from the plant dye after 3 days of soaking. We used Genista tinctoria, known as Dyer's Greenwood and also called Woadwaxen. It boils to a beautiful yellow color that really takes well to a T-shirt. Mine was originally an off-white color with a green pattern painted on it. It looks a lot better now with the contrast between the green and yellow. I am going to have to dye more shirts using Dyer's Greenwood and other plants. T-shirt is too boring? No problem, boil some plants and add some color! I might have to try a natural tie-dye shirt. That would be really fun.
Here's the shirt with a sprig of Dyer's Greenwood on it.