To produce quality fertilizers there are specific rules that outline the framework for fertilizers, specific-action products - including biostimulants -, soil improvers, growing media and corrective agents.
On AgroNotizie you can search all the rules of the sector, while on the website of the Ministry for Agricultural Policies there is an ad hoc section dedicated to the Register of fertilizer manufacturers.
On this page you will find three very interesting pdf files (in Italian language), edited by "Silc Fertilizzanti" experts.
Download the 3 basic rules on fertilizers and biostimulants
to know all the legal details on production and labeling