Metabolomic analysis of the roots and shoots of tomato seedlings treated with the commercial seaweed-derived biostimulant Afrikelp

•The primary metabolism of Afrikelp-treated tomato seeding roots and shoots is profiled.•Metabolites in the shoots are related to nitrogen and energy metabolism and hormone synthesis.•Metabolites in the roots suggest mycorrhizal colonisation.•Pathway analysis supports enhanced carbon and nitrogen metabolism pathways.