Wind retting is my name for a technique of retting I learned last year. It involves hanging fibers in an exposed place (such as a clothesline or the limb of a tree) until they have become retted. Traditional dew and
water retting have had varying results for me, as oftentimes the line between under retted and over retted is very very thin (I have wasted lots of fiber), but wind retting seems to be a gentle and easy method that is well suited especially to milkweed; but it
should also work with other fibers.
Milkweed is a difficult fiber to work with at times. With traditional retting, they break down very quickly while the thick, waxy bark often remains in place; whereas scraping can be labor-intensive. However, last year, having peeled some milkweed bark, I hung it over the limb of a birch tree in the open air. After a while I came back; the outer bark had broken down, and the bark strips had turned milkweed’s characteristic snowy white color. They can then be rubbed to release the pure fiber. It is one of the most attractive plant fibers I know—shining in color and soft to the touch. It is possible to get milkweed of this quality during the winter, but many are overretted and weak, and they may ret unevenly. So wind retting seems to me the best option so far for getting clothing-quality fibers from the plant.
I wonder how it would work for other fibers—nettle, hemp, etc.
I also left some stalks out in a sunny, exposed area this summer for a month or so, and it worked in the same way, though it is less easy to peel off, and earwigs made a home in the stalks. The picture below is from these stalks.