Manuka Honey is harvested in New Zealand from the most potent flowers of the Manuka bush, Leptospermum scoparium. This bush is native to New Zealand, and Manuka Honey has been used by the Maori people for over 2,000 years. What makes Manuka Honey so special? Manuka Honey is often referred to as "Unique Manuka Factor" or UMF Honey. This grading system was developed in New Zealand and is a measure of the unique properties found in Manuka Honey. The higher the UMF rating, the more potent the honey.