In article , Brian
writes
SBK will kill nettles and grass. However the nettles will not survive mowing
on a regular basis.
Nettles are a good indication of a very fertile soil.

Nettles are also excellent for adding fertility to soil, composted,
mulched or infused. See urg nettle FAQ at:
http://www.nugget.demon.co.uk/MetaFAQ/nettle.html
--
Alan & Joan Gould - North Lincs.