It's been a week of blue. At the community dye project I co-ordinate we harvested our indigo plants and had a really great day processing them. The story of our 'indigo in a season' is over here.
I was totally inspired and repeated the process at home using a Japanese Indigo plant grown from seed. The extraction method is based on a low-impact process that uses fresh leaves. Japanese Master Dyer Yoshioka Sachio pioneered this method. Information about the process available here, found via Wild Colours (where I also bought my indigo seeds). On silk and wool it makes turquoise shades.
There is such alchemy in producing these colours from a plant that at first glance promises little. It's been a good first year, and I'm looking forward to growing more.