after searching the web I found that retting nettles is not necessary to make good cordage! nice
TheJackinati wrote on May 23
rd, 2019 at 4:15am:
Sisal is probably tougher... but it is so rough that I dislike using it in a sling.
hemp, linen, nettles, ramie have the most strength per string mass.
sisal, jute, yucca and others have more mass for the same breaking strength.On the other hand these materials might have more abrasion resistance (important for slings).
until now linen has served me well , I'll try nettles out of curiosity.