Manuka is an evergreen tree native to New Zealand. Manuka honey contains an extraordinary, naturally present, very stable and powerful unique activity not found in any other variety of honey. UMF stands for "Unique Manuka Factor", and identifies the small proportion of Manuka Honey that contains the special unique activity. the UMF designation and rating is a highly sought-after and well-respected quality trademark that producers are proud to display on their label. the UMF quality trademark ranges from UMF 5+ upwards depending on UMF activity rating. This Manuka honey is guaranteed to be at least UMF20+ and has been verified by an independent testing laboratory. the UMF grading system appraises natural makers found in Manuka honey, and assures purity & quality.