If they wanted hemp, they might make better cordage of rushes, or perhaps of nettles, than of straw.
"A Journey to the Western Isles of Scotland" by Samuel Johnson
Ropes and nets are made from hemp and the common sting nettle, the latter being preferred.
"Overland through Asia; Pictures of Siberian, Chinese, and Tartar Life" by Thomas Wallace Knox
Wild hemp, nettles, grasses, and other like growths furnished much of the finer fibers.
"Prehistoric Textile Art of Eastern United States" by William Henry Holmes
Hemp is a kind of nettle.
"Needlework As Art" by Marian Alford