Biomass Ash 2018 seminar concentrated on the various examples to use biomass ash especially for fertilisation and liming in the Nordic countries. But also regulatory developments as e.g. from the Strubias project for revision of the fertiliser act were presented. The following workshop aims in information of existing and ongoing works from research to regulatory aspects and will highlight results of field tests and regular use. It is for bridging gaps of knowledge for beneficial biomass ash utilisation in the different European member states.