Experimenting with sticking nettle is a chapter by itself. We read somewhere that it contains fibers. We read in another place that its fibers were exclusive to royalties, some other places that it was used in the uniform of german soldiers at a certain time in history...
No matter what, litterature about nettles is almost not possible to find, neither on the net or in the libraries around Norway. If it exists, then god knows how much we tried and researched to get it without any considerable success.