At Amma’s visit we were given some leaflets in French about a firm called Purin d’Ortie et Cie, who supply various products that stimulate and protect plants, such as nettle manure made with EM (effective microorganisms).  “Nettles put into fermentation with 3% concentrated EM allow the development of a new product, especially recommended for impoverished lands, polluted and barren.”  Their website is http://www.purindortie-bretagne.com/.